What is star stuff?

Cats eye nebula

Nearly everything you see around you began deep inside a star. Only three elements, hydrogen and tiny amounts of helium and lithium, were formed at the beginning of the universe in the Big Bang. All of the other elements that make up our world need stars in order to form. Colossal explosions of stars and violent collisions between their collapsed cores spew fresh material out into the universe. As Carl Sagan famously stated, “We are made of star stuff.”

 

Cats eye nebula