The early planets consist mostly of compounds of heavier elements. As the planets grow in size, their gravitational fields increase, drawing in nebular dust, planetesimals and carbon-rich meteorites. Ultimately, Earth is massive enough and cool enough to retain lighter gaseous compounds of carbon, nitrogen, oxygen and hydrogen, the star stuff from which life will spring.
University of Montana--Missoula. Environmental Studies Program
© 1997 Stiftung Drittes Millennium
Digital File Format
Digital Image Number
Liebes, Sid; Mittelstadt, Laurie; Waugh, Barbara; and Brynes, Lois, "Panel 05: Star Stuff Of Life" (1997). A Walk Through Time - From Stardust To Us. 4.