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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://mastodon.social/users/vicgrinberg/statuses/111702510879214622">Dr. Victoria Grinberg (vicgrinberg@mastodon.social)'s status on Friday, 05-Jan-2024 22:38:42 JST</a><a href="https://mastodon.social/@vicgrinberg" title="vicgrinberg@mastodon.social"><img src="https://gnusocial.jp/avatar/15791-48-20240530232434.webp" width="48" height="48" alt="Dr. Victoria Grinberg" style="position: absolute; left: 0; top: 0;">Dr. Victoria Grinberg</a></section><article><p>It's mind-blowing how young some of our knowledge about the Universe is 🤯 </p><p>⭐  It's only since the seminal thesis of Cecilia Payne-Gaposchkin in 1925 that we know that stars are mainly made of hydrogen &amp; helium:<br>▶️ <a href="https://physicsworld.com/a/cecilia-payne-gaposchkin-the-woman-who-found-hydrogen-in-the-stars/" rel="nofollow noreferrer">https://physicsworld.com/a/cecilia-payne-gaposchkin-the-woman-who-found-hydrogen-in-the-stars/</a></p><p>🌀 And it's just so less than 100 years ago since Hubble, building on Henrietta Swan Leavitt’s period-luminosity relation for Cepheids, has shown that our own Milky Way is just one galaxy among many:<br>▶️ <a href="https://mastodon.social/@mcnees/111681549432325681" rel="nofollow noreferrer">https://mastodon.social/@mcnees/111681549432325681</a></p><p><a href="https://mastodon.social/tags/VicisAstro" rel="tag">#VicisAstro</a> <a href="https://mastodon.social/tags/Astrodon" rel="tag">#Astrodon</a> <a href="https://mastodon.social/tags/astronomy" rel="tag">#astronomy</a></p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/2546198#notice-5040659">In conversation</a><time datetime="2024-01-05T22:38:42+09:00" title="Friday, 05-Jan-2024 22:38:42 JST">about a year ago</time> <span>from <span><a href="https://mastodon.social/@vicgrinberg/111702510879214622" rel="external" title="Sent from mastodon.social via ActivityPub">mastodon.social</a></span></span><a href="https://mastodon.social/@vicgrinberg/111702510879214622">permalink</a><h4>Attachments</h4><ol><li><article><header><div>Domain not in remote thumbnail source whitelist: physicsworld.com</div><h5><a href="https://physicsworld.com/a/cecilia-payne-gaposchkin-the-woman-who-found-hydrogen-in-the-stars/">Cecilia Payne-Gaposchkin: the woman who found hydrogen in the stars – Physics World</a></h5><div> from <span>No Author</span></div></header><div>Sidney Perkowitz on Cecilia Payne-Gaposchkin, from her stellar astronomical findings to her struggle with bias against women in the early 20th century</div><footer></footer></article></li><li><article><header><div>Domain not in remote thumbnail source whitelist: files.mastodon.social</div><h5><a href="https://mastodon.social/@mcnees/111681549432325681#VicisAstro">Robert McNees (@mcnees@mastodon.social)</a></h5><div> from <span>Robert McNees</span></div></header><div>Attached: 1 imageIt’s hard to imagine the pre-Hubble view of the Universe, though it was less than 100 years ago. Just a year before Hubble’s announcement, many astronomers thought the collection of stars that make up our galaxy was Everything.Astronomer Harlow Shapley was perhaps the leading proponent of the establishment view. He had long argued that spiral nebulae seen by astronomers — shapes any kid would now recognize as galaxies — were just dust clouds inside the Milky Way.Images: Huntington Library</div><footer></footer></article></li></ol></footer></blockquote>

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Dr. Victoria Grinberg (vicgrinberg@mastodon.social)'s status on Friday, 05-Jan-2024 22:38:42 JST Dr. Victoria Grinberg
It's mind-blowing how young some of our knowledge about the Universe is 🤯
⭐ It's only since the seminal thesis of Cecilia Payne-Gaposchkin in 1925 that we know that stars are mainly made of hydrogen & helium:
▶️ https://physicsworld.com/a/cecilia-payne-gaposchkin-the-woman-who-found-hydrogen-in-the-stars/
🌀 And it's just so less than 100 years ago since Hubble, building on Henrietta Swan Leavitt’s period-luminosity relation for Cepheids, has shown that our own Milky Way is just one galaxy among many:
▶️ https://mastodon.social/@mcnees/111681549432325681
#VicisAstro #Astrodon #astronomy
In conversationabout a year ago from mastodon.socialpermalink
Attachments
1. Domain not in remote thumbnail source whitelist: physicsworld.com
  Cecilia Payne-Gaposchkin: the woman who found hydrogen in the stars – Physics World
  from No Author
  Sidney Perkowitz on Cecilia Payne-Gaposchkin, from her stellar astronomical findings to her struggle with bias against women in the early 20th century
2. Domain not in remote thumbnail source whitelist: files.mastodon.social
  Robert McNees (@mcnees@mastodon.social)
  from Robert McNees
  Attached: 1 image It’s hard to imagine the pre-Hubble view of the Universe, though it was less than 100 years ago. Just a year before Hubble’s announcement, many astronomers thought the collection of stars that make up our galaxy was Everything. Astronomer Harlow Shapley was perhaps the leading proponent of the establishment view. He had long argued that spiral nebulae seen by astronomers — shapes any kid would now recognize as galaxies — were just dust clouds inside the Milky Way. Images: Huntington Library

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