posted on Dec, 20 2011 @ 10:10 AM
reply to post by WarJohn
Earth may not be the "seed planet" but one one countless planets that have been "seeded" per se (although not necessarily intentionally seeded).
Think of it this way: Every element heavier than lithium was created inside a star
. The heavier elements inside your own body
once in the middle of a long-dead star. When those stars go super-nova, they spread those elements throughout the galaxy as interstellar dust. These
elements react with each other in this interstellar dust, and create organic compounds (NOT life, but the building blocks that can become life).
These interstellar clouds provide the material for what will eventually become a new solar systems. In these solar systems, these organic compounds
are found in comets, dust, and meteorites, plus were in the stuff the planets formed from. Studies we have done with interstellar dust (such as the
dust captured by NASA's "Stardust" mission (Link to Stardust Mission
) have shown these
building blocks of life are present.
The Earth (you, me, and everything on it) exists because of other long-dead stars -- stars which could
have had their own inhabited planets
circling around them.
Carl Sagan was being quite literal when he famously said "We are made of star-stuff"
So it is probably more accurate to say that exploding stars
are what spreads the "Seeds of life" throughout the universe. Our own Sun won't go
supernova (it isn't the right kind of star), but in a few billion years our Sun will throw off some of its outer layers. Those outer layers will
drift through space and may someday contribute material (although not life itself) to a new solar system that may one day give rise to another
edit on 12/20/2011 by Soylent Green Is People because: (no reason given)