What 19th-century scientific advancement proved that stars contained the same elements found on Earth?

Answer

Spectroscopy

Advancements in spectroscopy, which is the analysis of light to determine chemical makeup, allowed scientists to prove that stars contained elements identical to those found on Earth.

What 19th-century scientific advancement proved that stars contained the same elements found on Earth?

#Videos

Carl Sagan's Quote “We Are Made of Star-Stuff” Explained - YouTube

OriginAstronomercosmologystarmatter