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they say that the sun grows 5% and one day it will become a red giant and engulf three planets and one of the three planets are earth!

2007-06-16 07:45:18 · 16 answers · asked by Anonymous in Science & Mathematics Astronomy & Space

16 answers

It probably will happen, but I ensure you that it won't happen while you're alive.

2007-06-16 07:52:41 · answer #1 · answered by Menda 2 · 0 0

When our solar system's central star depletes its Hydrogen fuel, in about 5 billion years, we expect to see some changes. The sun will have to fusion Helium and has insufficient mass / density to do so. Even if it does (doubtful) the sun will likely expand in volume. It's mass shrinking slightly as small amounts are converted to energy. Even a small expansion will cause terrific changes on earth. A 5% expansion would likely end all life on the surface of earth. The greater expansion of which you speak may indeed engulf the earth or possibly all the inner planets right up to the asteroid belt. This red giant phase is the death knoll for a star and humans will have to leave this solar system long before these events come to pass.

2007-06-16 15:03:41 · answer #2 · answered by erikfaraway 3 · 0 0

The Sun does not have enough mass to explode as a supernova. Instead, in 4-5 billion years, it will enter a red giant phase, its outer layers expanding as the hydrogen fuel in the core is consumed and the core contracts and heats up. Helium fusion will begin when the core temperature reaches around 100 MK, and will produce carbon and oxygen. While it is likely that the expansion of the outer layers of the Sun will reach the current position of Earth's orbit, recent research suggests that mass lost from the Sun earlier in its red giant phase will cause the Earth's orbit to move further out, preventing it from being engulfed. However, Earth's water will be boiled away and most of its atmosphere will escape into space.

2007-06-16 14:56:56 · answer #3 · answered by rui_parker17 2 · 0 0

The Sun will grow, and by more than 5% too. It has goten about 30% brighter since Earth formed and it will continue to brighten until, in about a billion years it will be bright enough to boil the oceans dry and kill all life on the planet. About 3 billion years after that is will become a red giant, possibly engulfing Earth. But a billion years is a long time. The brightening is so slow compared to a human life time that we would never notice it, even with thousands of years of careful mesurements. We would have to watch for millions of years before it brightened enough to notice, and hundreds of millions of years before it got bright enough to cause enough warming to be a problem.

2007-06-16 14:52:53 · answer #4 · answered by campbelp2002 7 · 0 0

I'm not sure what you mean by the Sun growing 5%, it hasn't really grown or shrank noticeably as long as people have been watching it. But in 4 to 5 billion years, it will become a red giant, possibly swallowing up Mercury, Venus, and Earth.

Other models indicate that as the Sun changes in size, Earth's orbit will change as well, moving outward. However, the Earth will get so hot that oceans will boil and the atmosphere will escape into space.

2007-06-16 14:52:08 · answer #5 · answered by Gary 6 · 1 0

In about 4 billion years, the sun will expand into a red giant and engulf Mercury and Venus, and possibly Earth.
So the answer is yes, but not for a LONG time.

2007-06-16 21:15:53 · answer #6 · answered by Anonymous · 0 0

I read that the sun is midway in it's approximately 10 billion year lifecycle. In 5 billion years, the Sun's energy will be used up, causing the star to expand rapidly in to a red giant. And I think it will get much, much hotter and it will swallow up Mercury and Venus, making a Earth's surface one massive, boiling soup. Then it will shrink rapidly in to a neutron star do dense that one teaspoon of it would weigh a ton! (It will be around 20 kilometers in diameter) The Earth will be flung in to space, a direct result of it's gravitational pull being lost and it will just be another cold, scattered object in the universe.
Oh yes, and the Sun is not big enough to explode in to a Black Hole when it dies. (This phenomenon is called a Supernova)

2007-06-16 15:46:35 · answer #7 · answered by Anonymous · 0 0

Yes thats pretty much it, the sun's life cycle will bring it to the red giant stay and will incinerate the earth...long after your gone.

So for now, go outside, sit in the sunshine with a cool bottle of beer and relax...life is too short to worry about the end of the earth. (unless your under the drinking age, in that case drink
cola or something.)

Time is never wasted if your wasted all the time.

2007-06-16 14:58:34 · answer #8 · answered by Tsumego 5 · 0 0

The sun will eventually swallow up the solar system. It will take a very long time, not during our lifetime, but it will eventually explode and destroy most of the planets, but first it will expand up to the third planet (us) and THEN blow up. Kinda scary, but it won't happen for thousands, maybe millions, of years.

2007-06-16 15:25:36 · answer #9 · answered by Samantha Cullen 2 · 0 0

when the sun enters the red giants phase, the lack of density shall allow our planet to float away gently into a safer orbit

2007-06-16 16:42:42 · answer #10 · answered by Anonymous · 0 0

Simple answer, no smarty info needed- Yes. In billions of years, the inner planets are doomed.

2007-06-17 17:02:40 · answer #11 · answered by Horcrux 3 · 0 0

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