👤 whose
Whose work first showed that the Sun is a normal star made mainly of hydrogen and helium?
Quick Answer
Cecilia Payne-Gaposchkin proved in 1925 that stars are mostly hydrogen and helium. Her thesis transformed stellar astronomy.
The Full Story
Cecilia Payne-Gaposchkin used spectroscopy and physics to show that the Sun and stars are composed overwhelmingly of hydrogen and helium, not Earth-like elements. She completed her groundbreaking doctoral thesis in 1925 at Radcliffe College. Her result overturned the prevailing assumption that the Sun’s composition resembled Earth’s. Payne-Gaposchkin’s work became one of the most important advances in astrophysics.
Key Facts
1.Doctoral thesis completed in 1925
2.Showed stars are mostly hydrogen and helium
3.Major breakthrough in stellar spectroscopy
YouTube Angle
Suggested video title for this topic:
"The scientist who discovered what stars are actually made of"
Was this answer helpful?
Tap a reaction — it helps us pick what to cover next.