2006-08-11 03:33:57 · 9 answers · asked by suresh k 6 in Science & Mathematics ➔ Astronomy & Space
Energy generated in the Sun's core takes a million years to reach its surface. Every second 700 million tons of hydrogen are converted into helium ashes. In the process 5 million tons of pure energy is released; therefore, as time goes on the Sun is becoming lighter. The Sun appears to have been active for 4.6 billion years and has enough fuel to go on for another five billion years or so. At the end of its life, the Sun will start to fuse helium into heavier elements and begin to swell up, ultimately growing so large that it will swallow the Earth. After a billion years as a red giant, it will suddenly collapse into a white dwarf -- the final end product of a star like ours. It may take a trillion years to cool off completely.
2006-08-11 04:00:34 · answer #1 · answered by karthika 1 · 1⤊ 0⤋
The Sun has at least another 5 billion years of energy before it starts to run low.
2006-08-11 04:43:19 · answer #2 · answered by Kevin H 7 · 0⤊ 0⤋
About 4 to 5 billion years. Then it will turn into a red giant and incinerate most planets (inlcuding Earth), then it will shrink an turn into a white dwarf, and may remain so for several billion years, but in that phase, it will not put out much ligh and ehatr.
So, you can bank on about 4 billion years.
2006-08-11 03:53:35 · answer #3 · answered by Vincent G 7 · 1⤊ 0⤋
The sun is 5 billion years old.
It is expected to live another 5 billion years.
2006-08-11 04:53:22 · answer #4 · answered by Jack of all Trades 1 · 0⤊ 0⤋
We will probably be good for at least 4 Billion years before
the sun starts running out of fuel and acting up.
2006-08-11 03:56:18 · answer #5 · answered by Anonymous · 0⤊ 0⤋
4 to 5 billion years seems to be th consensus however i point out out that our bones won't even be fossils at that point in time so who cares I say party now throw your friends naked into the pool now get some serious hangovers and do all the things mom said not to and when it comes time to leave you'll be able to say you at least had a good time
2006-08-11 04:56:21 · answer #6 · answered by moonman123 1 · 0⤊ 0⤋
About 3 -4 billions years, but that is supposed to be when our galaxy- "The Milky Way" collides with "Andromeda" the closest galaxy to us. So it will be quite an event.
2006-08-11 04:02:20 · answer #7 · answered by jimhead 5 2 · 0⤊ 0⤋
that all is theory, if somehow future human technology can re cycle the sun fision& fusion , it would become another story
2006-08-11 04:00:55 · answer #8 · answered by Henry W 7 · 0⤊ 0⤋
more than 1oo millions year.
2006-08-11 03:55:23 · answer #9 · answered by Anonymous · 0⤊ 1⤋