{"id":1729,"date":"2026-02-09T08:22:35","date_gmt":"2026-02-09T08:22:35","guid":{"rendered":"https:\/\/gianlucamasi.it\/?page_id=1729"},"modified":"2026-04-13T10:25:44","modified_gmt":"2026-04-13T10:25:44","slug":"capitolo-3-immagini","status":"publish","type":"page","link":"https:\/\/gianlucamasi.it\/?page_id=1729","title":{"rendered":"Capitolo 3: Nuove frontiere"},"content":{"rendered":"<p style=\"text-align: center;\"><em>Cliccando sulle immagini viene visualizzata<br \/>\nla versione ad alta risoluzione in una nuova finestra<\/em><\/p>\n<figure id=\"attachment_1735\" aria-describedby=\"caption-attachment-1735\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/1_61CygPalomarSkySurvey.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1735\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/1_61CygPalomarSkySurvey-scaled.jpg\" alt=\"&lt;b&gt;1. La stella 61 Cygni, oggetto della prima misura di parallasse trigonometrica.&lt;\/b&gt;\" width=\"700\" height=\"472\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/1_61CygPalomarSkySurvey-scaled.jpg 2560w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/1_61CygPalomarSkySurvey-300x202.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/1_61CygPalomarSkySurvey-1024x691.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/1_61CygPalomarSkySurvey-768x518.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/1_61CygPalomarSkySurvey-1536x1036.jpg 1536w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/1_61CygPalomarSkySurvey-2048x1381.jpg 2048w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1735\" class=\"wp-caption-text\"><b>1. La stella 61 Cygni, oggetto della prima misura di parallasse trigonometrica.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1737\" aria-describedby=\"caption-attachment-1737\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/2_Bessel.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1737\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/2_Bessel.jpg\" alt=\"&lt;b&gt;2. Christian Albrecht Jensen (1792-1870), Ritratto di Friedrich Wilhelm Bessel, 1846.&lt;\/b&gt;\" width=\"700\" height=\"1231\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/2_Bessel.jpg 543w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/2_Bessel-171x300.jpg 171w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1737\" class=\"wp-caption-text\"><b>2. Christian Albrecht Jensen (1792-1870), Ritratto di Friedrich Wilhelm Bessel, 1846.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1747\" aria-describedby=\"caption-attachment-1747\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/2a_ParallasseBessel.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1747\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/2a_ParallasseBessel.jpg\" alt=\"&lt;b&gt;3. Friedrich Wilhelm Bessel, pagina dove l\u2019autore annuncia la distanza della 61 Cygni, pari a 10,3 anni luce, 1839.&lt;\/b&gt;\" width=\"700\" height=\"1176\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/2a_ParallasseBessel.jpg 1000w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/2a_ParallasseBessel-179x300.jpg 179w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/2a_ParallasseBessel-610x1024.jpg 610w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/2a_ParallasseBessel-768x1290.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/2a_ParallasseBessel-914x1536.jpg 914w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1747\" class=\"wp-caption-text\"><b>3. Friedrich Wilhelm Bessel, pagina dove l\u2019autore annuncia la distanza della 61 Cygni, pari a 10,3 anni luce, 1839.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1738\" aria-describedby=\"caption-attachment-1738\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/3_WilliamParsons.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1738\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/3_WilliamParsons-scaled.jpg\" alt=\"&lt;b&gt;4. Stephen Catterson Smith (1806\u20131872), ritratto di William Parsons, 1860.&lt;\/b&gt;\" width=\"700\" height=\"1362\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/3_WilliamParsons-scaled.jpg 1316w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/3_WilliamParsons-154x300.jpg 154w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/3_WilliamParsons-526x1024.jpg 526w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/3_WilliamParsons-768x1494.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/3_WilliamParsons-789x1536.jpg 789w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/3_WilliamParsons-1052x2048.jpg 1052w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1738\" class=\"wp-caption-text\"><b>4. Stephen Catterson Smith (1806\u20131872), ritratto di William Parsons, 1860.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1739\" aria-describedby=\"caption-attachment-1739\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/4_LeviatanoParsonstown.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1739\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/4_LeviatanoParsonstown-scaled.jpg\" alt=\"&lt;b&gt;5. Working Men's Educational Union (1853), il Leviatano di Parsonstown.&lt;\/b&gt;\" width=\"700\" height=\"525\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/4_LeviatanoParsonstown-scaled.jpg 2560w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/4_LeviatanoParsonstown-300x225.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/4_LeviatanoParsonstown-1024x768.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/4_LeviatanoParsonstown-768x576.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/4_LeviatanoParsonstown-1536x1152.jpg 1536w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/4_LeviatanoParsonstown-2048x1535.jpg 2048w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1739\" class=\"wp-caption-text\"><b>5. Working Men&#8217;s Educational Union (1853), il Leviatano di Parsonstown.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1750\" aria-describedby=\"caption-attachment-1750\" style=\"width: 2560px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/5a_Messier51Rapporto1845.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1750 size-full\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/5a_Messier51Rapporto1845-scaled.jpg\" alt=\"&lt;b&gt;6. Il rapporto di Lord Rosse relativo al suo lavoro sulla nebula M 51, presentato nel giugno del 1845. Curiosamente, per un refuso l\u2019oggetto \u00e8 indicato col numero \u201961'&lt;\/b&gt;\" width=\"2560\" height=\"824\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/5a_Messier51Rapporto1845-scaled.jpg 2560w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/5a_Messier51Rapporto1845-300x97.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/5a_Messier51Rapporto1845-1024x329.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/5a_Messier51Rapporto1845-768x247.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/5a_Messier51Rapporto1845-1536x494.jpg 1536w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/5a_Messier51Rapporto1845-2048x659.jpg 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/a><figcaption id=\"caption-attachment-1750\" class=\"wp-caption-text\"><b>6. Il rapporto di Lord Rosse relativo al suo lavoro sulla nebula M 51, presentato nel giugno del 1845. Curiosamente, per un refuso l\u2019oggetto \u00e8 indicato col numero \u201961&#8242;<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1741\" aria-describedby=\"caption-attachment-1741\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/5_Messier51Rosse.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1741\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/5_Messier51Rosse.jpg\" alt=\"&lt;b&gt;7. William Parsons, 1845: disegno della spirale di M 51, da Nasim (2010).&lt;\/b&gt;\" width=\"700\" height=\"479\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/5_Messier51Rosse.jpg 1000w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/5_Messier51Rosse-300x205.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/5_Messier51Rosse-768x525.jpg 768w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1741\" class=\"wp-caption-text\"><b>7. William Parsons, 1845: disegno della spirale di M 51, da Nasim (2010).<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1912\" aria-describedby=\"caption-attachment-1912\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/NGC5194_5april2025_c14_masi.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1912\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/NGC5194_5april2025_c14_masi.jpg\" alt=\"&lt;b&gt;8. La galassia Messier 51 e la sua compagna NGC 5195, riprese da Gianluca Masi.&lt;\/b&gt;\" width=\"700\" height=\"520\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/NGC5194_5april2025_c14_masi.jpg 2176w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/NGC5194_5april2025_c14_masi-300x223.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/NGC5194_5april2025_c14_masi-1024x760.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/NGC5194_5april2025_c14_masi-768x570.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/NGC5194_5april2025_c14_masi-1536x1141.jpg 1536w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/NGC5194_5april2025_c14_masi-2048x1521.jpg 2048w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1912\" class=\"wp-caption-text\"><b>8. La galassia Messier 51 e la sua compagna NGC 5195, riprese da Gianluca Masi.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1743\" aria-describedby=\"caption-attachment-1743\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/6_NGC1555_VariableNebula.gif\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1743\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/6_NGC1555_VariableNebula.gif\" alt=\"&lt;b&gt;9. La nebulosa variabile di Hind, NGC 1555, The Big Amateur Telescope.&lt;\/b&gt;\" width=\"700\" height=\"928\" \/><\/a><figcaption id=\"caption-attachment-1743\" class=\"wp-caption-text\"><b>9. La nebulosa variabile di Hind, NGC 1555, The Big Amateur Telescope.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1745\" aria-describedby=\"caption-attachment-1745\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/7_SpettroSolare.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1745\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/7_SpettroSolare.jpg\" alt=\"&lt;b&gt;10. Lo spettro solare.&lt;\/b&gt;\" width=\"700\" height=\"467\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/7_SpettroSolare.jpg 8192w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/7_SpettroSolare-300x200.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/7_SpettroSolare-1024x683.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/7_SpettroSolare-768x512.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/7_SpettroSolare-1536x1025.jpg 1536w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1745\" class=\"wp-caption-text\"><b>10. Lo spettro solare.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1753\" aria-describedby=\"caption-attachment-1753\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/10_PrimaFotoVega1850.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1753\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/10_PrimaFotoVega1850.jpg\" alt=\"&lt;b&gt;11. Il primo dagherrotipo di una stella, Vega. John A. Whipple e William C. Bond, 17 luglio 1850.&lt;\/b&gt;\" width=\"700\" height=\"466\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/10_PrimaFotoVega1850.jpg 1200w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/10_PrimaFotoVega1850-300x200.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/10_PrimaFotoVega1850-1024x682.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/10_PrimaFotoVega1850-768x511.jpg 768w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1753\" class=\"wp-caption-text\"><b>11. Il primo dagherrotipo di una stella, Vega. John A. Whipple e William C. Bond, 17 luglio 1850.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1755\" aria-describedby=\"caption-attachment-1755\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/11_FraunhoferSpettroscopio.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1755\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/11_FraunhoferSpettroscopio.jpg\" alt=\"&lt;b&gt;12. Richard Wimmer, Joseph von Fraunhofer presenta uno spettroscopio, 1897.&lt;\/b&gt;\" width=\"700\" height=\"550\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/11_FraunhoferSpettroscopio.jpg 1685w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/11_FraunhoferSpettroscopio-300x236.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/11_FraunhoferSpettroscopio-1024x805.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/11_FraunhoferSpettroscopio-768x604.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/11_FraunhoferSpettroscopio-1536x1208.jpg 1536w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1755\" class=\"wp-caption-text\"><b>12. Richard Wimmer, Joseph von Fraunhofer presenta uno spettroscopio, 1897.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1757\" aria-describedby=\"caption-attachment-1757\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/12_Huggins_William_1910.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1757\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/12_Huggins_William_1910.jpg\" alt=\"&lt;b&gt;13. William Huggins, 1910.&lt;\/b&gt;\" width=\"700\" height=\"1031\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/12_Huggins_William_1910.jpg 800w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/12_Huggins_William_1910-204x300.jpg 204w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/12_Huggins_William_1910-695x1024.jpg 695w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/12_Huggins_William_1910-768x1131.jpg 768w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1757\" class=\"wp-caption-text\"><b>13. William Huggins, 1910.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1762\" aria-describedby=\"caption-attachment-1762\" style=\"width: 1970px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/13_Huggins_William_Osservatorio.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1762 size-full\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/13_Huggins_William_Osservatorio.jpg\" alt=\"&lt;b&gt;14. Huggins all\u2019interno del suo osservatorio.&lt;\/b&gt;\" width=\"1970\" height=\"2484\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/13_Huggins_William_Osservatorio.jpg 1970w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/13_Huggins_William_Osservatorio-238x300.jpg 238w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/13_Huggins_William_Osservatorio-812x1024.jpg 812w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/13_Huggins_William_Osservatorio-768x968.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/13_Huggins_William_Osservatorio-1218x1536.jpg 1218w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/13_Huggins_William_Osservatorio-1624x2048.jpg 1624w\" sizes=\"auto, (max-width: 1970px) 100vw, 1970px\" \/><\/a><figcaption id=\"caption-attachment-1762\" class=\"wp-caption-text\"><b>14. Huggins all\u2019interno del suo osservatorio.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1765\" aria-describedby=\"caption-attachment-1765\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/14_HugginsSpettroscopio.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1765\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/14_HugginsSpettroscopio-scaled.jpg\" alt=\"&lt;b&gt;15. Uno degli spettroscopi utilizzati da Huggins.&lt;\/b&gt;\" width=\"700\" height=\"572\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/14_HugginsSpettroscopio-scaled.jpg 2560w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/14_HugginsSpettroscopio-300x245.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/14_HugginsSpettroscopio-1024x836.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/14_HugginsSpettroscopio-768x627.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/14_HugginsSpettroscopio-1536x1255.jpg 1536w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/14_HugginsSpettroscopio-2048x1673.jpg 2048w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1765\" class=\"wp-caption-text\"><b>15. Uno degli spettroscopi utilizzati da Huggins.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1767\" aria-describedby=\"caption-attachment-1767\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/15_SpettriAldebaranBetelgeuse.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1767\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/15_SpettriAldebaranBetelgeuse.jpg\" alt=\"&lt;b&gt;16. Spettri di Aldebaran e Betelgeuse ottenuti da Huggins.&lt;\/b&gt;\" width=\"700\" height=\"418\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/15_SpettriAldebaranBetelgeuse.jpg 2000w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/15_SpettriAldebaranBetelgeuse-300x179.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/15_SpettriAldebaranBetelgeuse-1024x611.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/15_SpettriAldebaranBetelgeuse-768x458.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/15_SpettriAldebaranBetelgeuse-1536x917.jpg 1536w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1767\" class=\"wp-caption-text\"><b>16. Spettri di Aldebaran e Betelgeuse ottenuti da Huggins.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1920\" aria-describedby=\"caption-attachment-1920\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/Aldebaran_28jan2025_masi.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1920\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/Aldebaran_28jan2025_masi.jpg\" alt=\"&lt;b&gt;17. La brillante Aldebaran si staglia dinanzi alle &quot;Iadi&quot; con la sua inconfondibile luce aranciata.&lt;\/b&gt;\" width=\"700\" height=\"451\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/Aldebaran_28jan2025_masi.jpg 2534w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/Aldebaran_28jan2025_masi-300x193.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/Aldebaran_28jan2025_masi-1024x660.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/Aldebaran_28jan2025_masi-768x495.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/Aldebaran_28jan2025_masi-1536x990.jpg 1536w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/Aldebaran_28jan2025_masi-2048x1320.jpg 2048w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1920\" class=\"wp-caption-text\"><b>17. La brillante Aldebaran si staglia dinanzi alle &#8220;Iadi&#8221; con la sua inconfondibile luce aranciata.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1768\" aria-describedby=\"caption-attachment-1768\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/16_SpettroNGC6543.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1768\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/16_SpettroNGC6543.jpg\" alt=\"&lt;b&gt;18. Il peculiare spettro della nebulosa planetaria NGC 6543 ottenuto da Huggins.&lt;\/b&gt;\" width=\"700\" height=\"203\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/16_SpettroNGC6543.jpg 2038w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/16_SpettroNGC6543-300x87.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/16_SpettroNGC6543-1024x297.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/16_SpettroNGC6543-768x223.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/16_SpettroNGC6543-1536x446.jpg 1536w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1768\" class=\"wp-caption-text\"><b>18. Il peculiare spettro della nebulosa planetaria NGC 6543 ottenuto da Huggins.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1771\" aria-describedby=\"caption-attachment-1771\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/17_SiriusSpettro.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1771\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/17_SiriusSpettro.jpg\" alt=\"&lt;b&gt;19. Spettro di Sirius, secondo le osservazioni di Huggins.&lt;\/b&gt;\" width=\"700\" height=\"333\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/17_SiriusSpettro.jpg 1800w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/17_SiriusSpettro-300x143.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/17_SiriusSpettro-1024x486.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/17_SiriusSpettro-768x365.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/17_SiriusSpettro-1536x730.jpg 1536w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1771\" class=\"wp-caption-text\"><b>19. Spettro di Sirius, secondo le osservazioni di Huggins.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1773\" aria-describedby=\"caption-attachment-1773\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/18_SecchiSpettri.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1773\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/18_SecchiSpettri.jpg\" alt=\"&lt;b&gt;20. Alcuni degli spettri pubblicati da Angelo Secchi, 1877.&lt;\/b&gt;\" width=\"700\" height=\"457\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/18_SecchiSpettri.jpg 1700w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/18_SecchiSpettri-300x196.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/18_SecchiSpettri-1024x669.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/18_SecchiSpettri-768x502.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/18_SecchiSpettri-1536x1004.jpg 1536w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1773\" class=\"wp-caption-text\"><b>20. Alcuni degli spettri pubblicati da Angelo Secchi, 1877.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1779\" aria-describedby=\"caption-attachment-1779\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/19_RobertsM31.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1779\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/19_RobertsM31.jpg\" alt=\"&lt;b&gt;21. La Nebula di Andromeda, fotografata da Isaac Roberts il 29 dicembre 1888.&lt;\/b&gt;\" width=\"700\" height=\"859\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/19_RobertsM31.jpg 2014w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/19_RobertsM31-245x300.jpg 245w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/19_RobertsM31-835x1024.jpg 835w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/19_RobertsM31-768x942.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/19_RobertsM31-1252x1536.jpg 1252w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/19_RobertsM31-1669x2048.jpg 1669w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1779\" class=\"wp-caption-text\"><b>201 La Nebula di Andromeda, fotografata da Isaac Roberts il 29 dicembre 1888.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1914\" aria-describedby=\"caption-attachment-1914\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/m31_24_26aug2025_masi.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1914\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/m31_24_26aug2025_masi.jpg\" alt=\"&lt;b&gt;22. Messier 31, ripresa da Gianluca Masi.&lt;\/b&gt;\" width=\"700\" height=\"496\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/m31_24_26aug2025_masi.jpg 9600w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/m31_24_26aug2025_masi-300x213.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/m31_24_26aug2025_masi-1024x725.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/m31_24_26aug2025_masi-768x544.jpg 768w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1914\" class=\"wp-caption-text\"><b>22. Messier 31, ripresa da Gianluca Masi.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1782\" aria-describedby=\"caption-attachment-1782\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/20_Crossley.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1782\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/20_Crossley.jpg\" alt=\"&lt;b&gt;23. Il riflettore Crossley del Lick Observatory, 1908&lt;\/b&gt;\" width=\"700\" height=\"872\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/20_Crossley.jpg 1620w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/20_Crossley-241x300.jpg 241w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/20_Crossley-822x1024.jpg 822w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/20_Crossley-768x957.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/20_Crossley-1233x1536.jpg 1233w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1782\" class=\"wp-caption-text\"><b>23. Il riflettore Crossley del Lick Observatory, 1908<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1784\" aria-describedby=\"caption-attachment-1784\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/21_Kapteyn.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1784\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/21_Kapteyn.jpg\" alt=\"&lt;b&gt;24. Jan Veth (1864\u20131925), ritratto di Jacobus C. Kapteyn, 1921.&lt;\/b&gt;\" width=\"700\" height=\"894\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/21_Kapteyn.jpg 960w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/21_Kapteyn-235x300.jpg 235w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/21_Kapteyn-802x1024.jpg 802w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/21_Kapteyn-768x981.jpg 768w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1784\" class=\"wp-caption-text\"><b>24. Jan Veth (1864\u20131925), ritratto di Jacobus C. Kapteyn, 1921.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1786\" aria-describedby=\"caption-attachment-1786\" style=\"width: 1400px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/22_KapteynGalassia.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1786 size-full\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/22_KapteynGalassia.jpg\" alt=\"&lt;b&gt;25. Profili di densit\u00e0 stellare nella Via Lattea, secondo l'ultimo modello di Kapteyn, 1922. Il Sole (lettera S cerchiata) non si trova al centro del sistema di riferimento.&lt;\/b&gt;\" width=\"1400\" height=\"373\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/22_KapteynGalassia.jpg 1400w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/22_KapteynGalassia-300x80.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/22_KapteynGalassia-1024x273.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/22_KapteynGalassia-768x205.jpg 768w\" sizes=\"auto, (max-width: 1400px) 100vw, 1400px\" \/><\/a><figcaption id=\"caption-attachment-1786\" class=\"wp-caption-text\"><b>25. Profili di densit\u00e0 stellare nella Via Lattea, secondo l&#8217;ultimo modello di Kapteyn, 1922. Il Sole (lettera S cerchiata) non si trova al centro del sistema di riferimento.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1788\" aria-describedby=\"caption-attachment-1788\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/23_GoodrickeDeltaCep.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1788\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/23_GoodrickeDeltaCep.jpg\" alt=\"&lt;b&gt;26. L\u2019articolo con cui John Goodricke annuncia,, nel 1785, la scoperta delle variazioni di luminosit\u00e0 di Delta Cephei.&lt;\/b&gt;\" width=\"700\" height=\"1139\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/23_GoodrickeDeltaCep.jpg 1424w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/23_GoodrickeDeltaCep-184x300.jpg 184w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/23_GoodrickeDeltaCep-629x1024.jpg 629w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/23_GoodrickeDeltaCep-768x1250.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/23_GoodrickeDeltaCep-944x1536.jpg 944w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/23_GoodrickeDeltaCep-1258x2048.jpg 1258w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1788\" class=\"wp-caption-text\"><b>26. L\u2019articolo con cui John Goodricke annuncia,, nel 1785, la scoperta delle variazioni di luminosit\u00e0 di Delta Cephei.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1790\" aria-describedby=\"caption-attachment-1790\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/24_LeavittConCannon.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1790\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/24_LeavittConCannon.jpg\" alt=\"&lt;b&gt;27. Henrietta S. Leavitt (a destra) con Annie J. Cannon, dinanzi all\u2019Harvard College Observatory, 1913.&lt;\/b&gt;\" width=\"700\" height=\"929\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/24_LeavittConCannon.jpg 960w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/24_LeavittConCannon-226x300.jpg 226w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/24_LeavittConCannon-772x1024.jpg 772w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/24_LeavittConCannon-768x1019.jpg 768w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1790\" class=\"wp-caption-text\"><b>27. Henrietta S. Leavitt (a destra) con Annie J. Cannon, dinanzi all\u2019Harvard College Observatory, 1913.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1792\" aria-describedby=\"caption-attachment-1792\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/25_PeriodoLumiCefeideLeavitt.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1792\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/25_PeriodoLumiCefeideLeavitt.jpg\" alt=\"&lt;b&gt;28. La relazione periodo-luminosit\u00e0 per 25 Cefeidi della Piccola Nube di Magellano, pubblicata da Leavitt nel 1912. Nella fig. 1, i periodi sono espressi in giorni, nella fig. 2 appare il relativo logaritmo. In entrambi i casi in ordinata appaiono le magnitudini al massimo e al minimo.&lt;\/b&gt;\" width=\"700\" height=\"343\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/25_PeriodoLumiCefeideLeavitt.jpg 1898w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/25_PeriodoLumiCefeideLeavitt-300x147.jpg 300w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/25_PeriodoLumiCefeideLeavitt-1024x502.jpg 1024w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/25_PeriodoLumiCefeideLeavitt-768x376.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/25_PeriodoLumiCefeideLeavitt-1536x753.jpg 1536w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1792\" class=\"wp-caption-text\"><b>28. La relazione periodo-luminosit\u00e0 per 25 Cefeidi della Piccola Nube di Magellano, pubblicata da Leavitt nel 1912. Nella fig. 1, i periodi sono espressi in giorni, nella fig. 2 appare il relativo logaritmo. In entrambi i casi in ordinata appaiono le magnitudini al massimo e al minimo.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1794\" aria-describedby=\"caption-attachment-1794\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/26_Slipher_Lowell_Telescope.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1794\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/26_Slipher_Lowell_Telescope.jpg\" alt=\"&lt;b&gt;29. Vesto M. Slipher in posa con lo spettroscopio al fuoco del glorioso rifrattore da 61 centimetri del Lowell Observatory.&lt;\/b&gt;\" width=\"700\" height=\"942\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/26_Slipher_Lowell_Telescope.jpg 1219w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/26_Slipher_Lowell_Telescope-223x300.jpg 223w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/26_Slipher_Lowell_Telescope-761x1024.jpg 761w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/26_Slipher_Lowell_Telescope-768x1033.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/02\/26_Slipher_Lowell_Telescope-1142x1536.jpg 1142w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1794\" class=\"wp-caption-text\"><b>29. Vesto M. Slipher in posa con lo spettroscopio al fuoco del glorioso rifrattore da 61 centimetri del Lowell Observatory.<\/b><\/figcaption><\/figure>\n<figure id=\"attachment_1907\" aria-describedby=\"caption-attachment-1907\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/27_MotiMessier101VanMaanen.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1907\" src=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/27_MotiMessier101VanMaanen.jpg\" alt=\"&lt;b&gt;30. Moti interni in Messier 101, van Maanen 1916.&lt;\/b&gt;\" width=\"700\" height=\"877\" srcset=\"https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/27_MotiMessier101VanMaanen.jpg 1354w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/27_MotiMessier101VanMaanen-240x300.jpg 240w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/27_MotiMessier101VanMaanen-818x1024.jpg 818w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/27_MotiMessier101VanMaanen-768x962.jpg 768w, https:\/\/gianlucamasi.it\/wp-content\/uploads\/2026\/03\/27_MotiMessier101VanMaanen-1226x1536.jpg 1226w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><figcaption id=\"caption-attachment-1907\" class=\"wp-caption-text\"><b>30. Moti interni in Messier 101, van Maanen 1916.<\/b><\/figcaption><\/figure>\n<p><a href=\"https:\/\/gianlucamasi.it\/?page_id=1547\"><strong>Torna a \u201cQuando l\u2019universo divent\u00f2 infinito&#8221;<\/strong><\/a><\/p>\n<h6><em>Crediti<\/em><\/h6>\n<ol>\n<li><em><a href=\"https:\/\/archive.stsci.edu\/cgi-bin\/dss_form\" target=\"_blank\" rel=\"noopener\">The Digitized Sky Survey 2, Palomar Observatory<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/it.wikipedia.org\/wiki\/Creative_Commons\" target=\"_blank\" rel=\"noopener\">Wikimedia Creative Commons<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/www.biodiversitylibrary.org\/bibliography\/58332\" target=\"_blank\" rel=\"noopener\">The London and Edinburgh philosophical magazine and journal of science<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/it.wikipedia.org\/wiki\/Creative_Commons\" target=\"_blank\" rel=\"noopener\">Wikimedia Creative Commons<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/it.wikipedia.org\/wiki\/Creative_Commons\" target=\"_blank\" rel=\"noopener\">Wikimedia Creative Commons<\/a>;<\/em><\/li>\n<li><em><a href=\"http:\/\/15th Meeting (1845) - Report of the British Association for the Advancement of Science\" target=\"_blank\" rel=\"noopener\">15th Meeting (1845) &#8211; Report of the British Association for the Advancement of Science<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/offalyarchives.com\/index.php\/birr-castle-archives\" target=\"_blank\" rel=\"noopener\">Birr Castle Archives<\/a>;<\/em><\/li>\n<li><a href=\"https:\/\/www.virtualtelescope.eu\/2025\/04\/10\/messier-51-the-whirlpool-galaxy-a-close-up-image-4-mar-2025\/\" target=\"_blank\" rel=\"noopener\"><em>The Virtual Telescope Project<\/em><\/a><\/li>\n<li><em><a href=\"https:\/\/bigamateurtelescope.com\/\" target=\"_blank\" rel=\"noopener\">The Big Amateur Telescope<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/science.nasa.gov\/resource\/the-solar-spectrum\/\" target=\"_blank\" rel=\"noopener\">N. A. Sharp, NOAO\/NSO\/Kitt Peak FTS\/AURA\/NSF<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/it.wikipedia.org\/wiki\/Creative_Commons\" target=\"_blank\" rel=\"noopener\">Wikimedia Creative Commons<\/a>, autore Maximo Malatesta;<\/em><\/li>\n<li><em><a href=\"https:\/\/it.wikipedia.org\/wiki\/Creative_Commons\" target=\"_blank\" rel=\"noopener\">Wikimedia Creative Commons<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/it.wikipedia.org\/wiki\/Creative_Commons\" target=\"_blank\" rel=\"noopener\">Wikimedia Creative Commons<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/www.wellesley.edu\/about-us\/offices-departments\/library-technology-services\" target=\"_blank\" rel=\"noopener\">Wellesley College Library<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/wellcomecollection.org\/visit-us\/the-library\" target=\"_blank\" rel=\"noopener\">Wellcome Library<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/wellcomecollection.org\/visit-us\/the-library\" target=\"_blank\" rel=\"noopener\">Wellcome Library<\/a>;<\/em><\/li>\n<li><a href=\"https:\/\/www.virtualtelescope.eu\/2025\/01\/27\/the-jan-2025-planetary-parade-images-and-podcast\/\" target=\"_blank\" rel=\"noopener\"><em>The Virtual Telescope Project<\/em><\/a>;<\/li>\n<li><em><a href=\"https:\/\/wellcomecollection.org\/visit-us\/the-library\" target=\"_blank\" rel=\"noopener\">Wellcome Library<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/wellcomecollection.org\/visit-us\/the-library\" target=\"_blank\" rel=\"noopener\">Wellcome Library<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/books.google.co.uk\/books?id=2tscRwYY71kC\" target=\"_blank\" rel=\"noopener\"><span style=\"font-size: 1em;\">Le Stelle, saggio di Astronomia siderale, 1877<\/span><\/a><\/em><\/li>\n<li><em><span style=\"font-size: 1em;\"><a style=\"font-family: Rokkitt, sans-serif; font-style: italic;\" href=\"https:\/\/catalog.lindahall.org\/discovery\/search?vid=01LINDAHALL_INST:LHL\" target=\"_blank\" rel=\"noopener\">Courtesy of The Linda Hall Library of Science, Engineering &amp; Technology<\/a>;<\/span><\/em><\/li>\n<li><em><a href=\"https:\/\/www.virtualtelescope.eu\" target=\"_blank\" rel=\"noopener\">The Virtual Telescope Project<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/libraries.universityofcalifornia.edu\" target=\"_blank\" rel=\"noopener\">University of California Libraries<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/it.wikipedia.org\/wiki\/Creative_Commons\" target=\"_blank\" rel=\"noopener\">Wikimedia Creative Commons<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/iopscience.iop.org\/journal\/0004-637X\" target=\"_blank\" rel=\"noopener\">The Astrophysical Journal<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/royalsocietypublishing.org\">The Royal Society Publishing<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/it.wikipedia.org\/wiki\/Creative_Commons\" target=\"_blank\" rel=\"noopener\">Wikimedia Creative Commons<\/a>;<\/em><\/li>\n<li><em><a href=\"https:\/\/hco.cfa.harvard.edu\" target=\"_blank\" rel=\"noopener\">Harvard College Observatory<\/a>;<\/em><\/li>\n<li><a href=\"https:\/\/lowell.edu\" target=\"_blank\" rel=\"noopener\"><em>Lowell Observatory<\/em><\/a>;<\/li>\n<li><em><a href=\"https:\/\/ui.adsabs.harvard.edu\/abs\/1916ApJ....44..210V\/abstract\" target=\"_blank\" rel=\"noopener\">Astrophysical Journal<\/a><\/em>.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Cliccando sulle immagini viene visualizzata la versione ad alta risoluzione in una nuova finestra Torna a \u201cQuando l\u2019universo divent\u00f2 infinito&#8221; Crediti The Digitized Sky Survey&#8230;<\/p>\n<div class=\"more-link-wrapper\"><a class=\"more-link\" href=\"https:\/\/gianlucamasi.it\/?page_id=1729\">Leggi tutto<span class=\"screen-reader-text\">Capitolo 3: Nuove frontiere<\/span><\/a><\/div>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-1729","page","type-page","status-publish","hentry","entry"],"_links":{"self":[{"href":"https:\/\/gianlucamasi.it\/index.php?rest_route=\/wp\/v2\/pages\/1729","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gianlucamasi.it\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/gianlucamasi.it\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/gianlucamasi.it\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/gianlucamasi.it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1729"}],"version-history":[{"count":36,"href":"https:\/\/gianlucamasi.it\/index.php?rest_route=\/wp\/v2\/pages\/1729\/revisions"}],"predecessor-version":[{"id":2030,"href":"https:\/\/gianlucamasi.it\/index.php?rest_route=\/wp\/v2\/pages\/1729\/revisions\/2030"}],"wp:attachment":[{"href":"https:\/\/gianlucamasi.it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1729"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}