מימן הופך להליום וזהו מקור האנרגיה של השמש (וגם הסיבה שיום אחד השמש תמות. כל המימן יכלה). אז למה העתקת כנראה כמו תוכי מויקיפדיה את המשפטים על ה"פוזיה" שיש בשמש ואין בפלנטות, במקום לכתוב פשוט "היתוך"? ההנחה שלי: אכן, העתקת כמו תוכי, ולא הבנת מה אתה קורא.
האם ידוע לך מי גילתה בזמנו (1925 ) שהשמש עשויה בעיקר מימן? וכך גם כוכבים אחרים?האסטרונומית ססיליה פיין -גפושקין. עמיתיה חשבו שבשמש יש ליבה של ברזל, והם עשו לה את המוות. הם בכלל השתדלו להתעלל בה נפשית, מהיותה אשה יחידה בתוך קבוצה של גברים שחשבו כנראה כי בלעו את האמת כולה.....
Harvard. It was at Harvard that she achieved her greater success and flourished as an astronomer.
The Sun and the Stars theory
Payne’s PhD thesis is considered by many astronomers as one of the best and most influential in the field of astronomy. In her PhD, Cecilia managed to explain what stars are made of, including the Sun. However, she was never given proper credit for the discovery, as astronomer Henry Norris Russell persuaded her not to present her conclusion. He later published the discovery on his own behalf. He did mention Cecilia in her paper, but it was Russell who got all the credit for the discovery.
In her PhD, Cecilia managed to accurately relate the spectral classes of stars to their actual temperatures. She did so by applying the ionization theory. In the PhD, Cecilia argued that the variation of the stellar absorption lines was more due to different amounts of ionization. The main discovery was that the Sun was made out of silicon, carbon and other metals, many of which can also be found in the Earth spectrum. What was important discovery is that Payne found out that helium and hydrogen were vastly more present in the Sun and in stars in general. In her PhD, Cecilia Payne argued that hydrogen is actually the most abundant element in the Universe.
When she was about to present her PhD and conclusion, Henry Norris Russell persuaded her not to present the conclusion that the composition of the Sun is mostly made out of hydrogen. The main thesis in her PhD was that hydrogen is the main component of the Sun, making the Sun and other stars very different in composition than the Earth. Four years later, Russell changed his mind and published a paper on the matter. Her thesis was proven correct, but was never given the proper credit.
For her PhD, Payne measured the absorption lines in stellar spectra for two years before starting to write the thesis.