What do astronomers mean when they say that we are all "star stuff"?
A)that life would be impossible without energy from the Sun
B)that Earth formed at the same time as the Sun
C)that the carbon,oxygen,and many elements essential to life were created by nucleosynthesis in stellar cores
D)that the Sun formed from the interstellar medium: the "stuff" between the stars
E)that the Universe contains billions of stars

Question

Quizplus · Accepted Answer

Astronomers mean that the carbon, oxygen, and many elements essential to life were created by nucleosynthesis in stellar cores. Elements heavier than hydrogen and helium were formed inside stars through fusion reactions, and then expelled into space through stellar explosions. These elements eventually became incorporated into new stars and planets, including Earth and all life on it.

What Do Astronomers Mean When They Say That We Are