2006-09-22 06:52:05 · 27 answers · asked by MzMarquesHouston_225 1 in Science & Mathematics ➔ Astronomy & Space
A few billion years.
2006-09-22 06:52:52 · answer #1 · answered by campbelp2002 7 · 0⤊ 1⤋
The Sun, in 4.5 billion years supposedly, WILL start to swell. It will get bigger, and en-gulp Mercury and Venus. The atmosphere will evaporate, water will melt, and life will be gone. The sun will swell enough to devour the earth, then shrink, grow, Turn into a planetary nebula, then shrink, for the last time, into a white dwarf. Then In a few billion years, cool down to a black dwarf.
The reason the sun expands, In case you want to know, Is because of its fuel supply. The energy from the sun comes from nuclear fusion of Helium. When the helium supply runs out, The sun has to fuse hydrogen, therefore making the sun swell. The sun then will Shrink, once its helium supply is restored, grow again, then cast out a planetary nebula (For what a planetary nebula looks like, Look up the ring nebula) then it wont have enough hydrogen to grow back to the normal size...and become a white dwarf. Eventually, it will cool into a black dwarf and die.
2006-09-22 08:35:15 · answer #2 · answered by iam"A"godofsheep 5 · 0⤊ 0⤋
The Sun is about 4.6 billion years old and is about halfway through its main-sequence evolution, during which nuclear fusion reactions in its core fuse hydrogen into helium. Each second, more than 4 million tonnes of matter are converted into energy within the Sun's core, producing neutrinos and solar radiation.
Life-cycle of the SunIn about 5 billion years, the Sun will evolve into a red giant and then a white dwarf, creating a planetary nebula in the process.
2006-09-22 08:21:26 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Sun has been in existence for more than 5 billion years and our universe for 15 billion years. We see many stars breaking up or becoming black holes. No one has made precise estimates of Sun's life. It is however reasonable to expect it to survive/burn for another 5 billion years.
2006-09-22 06:59:16 · answer #4 · answered by openpsychy 6 · 0⤊ 0⤋
5 billion years before it settles down as a white dwarf. Then it will continue to cool for billions of years, but he Earth will no longer be habitable. Not to worry, I'm more concerned that the
Earths' habitability will last for another 1000 years.
2006-09-22 06:56:42 · answer #5 · answered by Anonymous · 0⤊ 0⤋
I think that the answer is 5 billion years....but that might be just the time we have before it turns into a red giant and engulfs the Earth......still you have all the time in the world...except for that aging thing.
2006-09-22 06:56:17 · answer #6 · answered by eantaelor 4 · 1⤊ 0⤋
about 4.5 billion years and then the sun will start to expand enough to swallow our planet. but we will die way before then anyways when the moons gets so far away from us and doesnt orbit us anymore which will cause our planet to go into a weather nightmare
2006-09-22 06:57:37 · answer #7 · answered by Al Bundy 4 · 0⤊ 0⤋
A couple of more weeks. Stock up on the diesel fuel or you're gonna get cold.
2006-09-24 01:28:50 · answer #8 · answered by Dave 5 · 0⤊ 0⤋
Till tomorrow at 7pm
2006-09-22 11:42:24 · answer #9 · answered by Anonymous · 0⤊ 0⤋
about 4.5 billion years. we are right in the mid point of the universe's life span. But better hurry and do what you want to do before the curtain goes down and the shows over....hurry
2006-09-22 06:53:50 · answer #10 · answered by MiKe 3 · 0⤊ 1⤋