Constitution of the stars

Spectral analysis of stars revealed that their composition was similar to elements found on Earth, suggesting a commonality in the universe's materials. This discovery supported the idea that the universe comprises the same elements throughout.
 William Huggins England 1863 Constitution of the stars

Spectral analysis of stars revealed that their composition was similar to elements found on Earth, suggesting a commonality in the universe's materials. This discovery supported the idea that the universe comprises the same elements throughout.