AST 111 Lecture Notes - Lecture 10: Radiometric Dating, Radiocarbon Dating, Space Debris
Document Summary
Ast 111: lect 10-the formation of stars and galaxies. The cosmic amounts of the elements are the result of how stars evolve. The other elements came from births and deaths of previous stars! The elements are changing in to other elements! When half of the matter is gone, it is called a half-life: carbon dating is most common because of its relatively short half-life. Using radioactive dating, they have said the universe is only 4. 56 billion years old. When new stars form, they have disks around them full of matter. This matter is what forms all of the planets and space debris in the solar system.
