ABUNDANCES OF ELEMENTS
WE FIND SIMILAR RELATIVE AMOUNTS OF THE DIFFERENT ELEMENTS BY COMPARING
- ELEMENTS IN THE SUN FROM ITS LIGHT
(SPECTROSCOPY)
- ELEMENTS IN METEORITES THAT IMPACT ON EARTH
- ELEMENTS IN THE EARTH
THUS THE SUN, EARTH, AND PLANETS FORMED (CONDENSED) FROM THE
SOLAR NEBULA - THE ORIGINAL MATERIAL OF THE SOLAR SYSTEM
(Press & Siever)