2007-02-19 12:15:17 · 5 answers · asked by elmer z 1 in Science & Mathematics ➔ Earth Sciences & Geology
I'm not sure what you're asking so I'll address both questions you might be asking...
Fifteen billion years ago there was no sun or Earth - evidence suggests that the Earth is about 4.6 billion years old.
Fifteen billion years from now the earth will have long ago been vaporized when the sun expanded into a red giant star as it used up all its hydrogen fuel. Our sun is thought to be about 5 billion years old. Stars like the sun are thought to have about 10 billion years worth of hydrogen fuel - which means that we've got from 4-5 billion years left until the sun expands and vaporizes Earth.
So, 15 billion years from now = no earth; 15 billion years ago = no earth.
2007-02-19 13:19:10 · answer #1 · answered by brooks b 4 · 0⤊ 0⤋
The Earth did not exist 15 billion years ago.
About 10 or 12 billion years from now, the Sun will expand and vaporize the Earth.
2007-02-19 20:21:11 · answer #2 · answered by morningfoxnorth 6 · 0⤊ 0⤋
I'm just going to assume you mean what I think you do.
The Earth isn't that old, but I suppose that it might have been a asteroid.
The Sun will either vaporize the Earth, or a huge meteor will crash into the Earth, creating such a wave of energy and chemicals that the human race will die out.
There are many questions about each, before and after. It's all about what *you* think. Draw from that.
2007-02-19 20:44:04 · answer #3 · answered by Insert_Name_Here 3 · 0⤊ 0⤋
does it matter?
2007-02-19 20:22:53 · answer #4 · answered by The Eagle Keeper 7 · 0⤊ 0⤋
huh? please rephrase
2007-02-19 20:19:25 · answer #5 · answered by tasgunter 3 · 0⤊ 0⤋