If the sun blows out,how cold will it get?

Answer 1

As some pointed out, it would take many billions of years for the sun to use up all it's nuclear fuel. Along the way, the earth could be destroyed - for example if the sun goes into a red giant phase, the earth's orbit could end up inside the volume of the Sun. Of if the sun became a supernova we would be destroyed by the blast and radiation. Finally the earth does have radioactive heating but after many many billions of years that would also decay to essentially nothing.

So if you are really asking what is the temperature in space far from any point source of heat, then the answer is not absolute zero as some have stated. The entire universe is bathed in the cosmic microwave background radiation (CMB). Currently the actual temperature of the cosmic microwave background is 2.725 degrees Kelvin (above absolute zero). So eventually we would come to equilibrium with the CMB radiation. Now the current temperature is 2.725 degrees but that temperature does fall with time and will eventually get close to absolute zero after many trillions of years -- but it will never be exactly 0.

Answer 2

Sun will not blow out and I think there is atomic fusion in the sun I suppose.. It has been millions of years Since the Sun is there and people must be thinking that some stars are vanishishing taht is because Sun is also moving with the solra system ..There must be recycling of atomic fuel in the Sun other wise without fuel natural atomic recators also will not work ..
If you put a atom bomb it will extinguish in a small time.. Hence I think the Sun will not extinguish but may be after trillions of years..It is impossible to make a sun by a human being..But we can try it out and at that time we may make a duplicate sun//
Regards my persobnal website http://www.maheshnbiomedical.com

Answer 3

Just think about Antarctica. How cold there?? Think about those countries & areas in the world which temparature get down under zero degree during winter. Although the sun is present the temparature will be below zero. Now think about the absence of the SUN!!!! The whole galaxy will be frozen.

Answer 4

The radioactivity in the center of the Earth will warm up the surface -- to about 5 or 10 degrees C above absolute zero. When the radioactivity dies out (in about 10 billion or 20 billion years), then the Earth will cool down to the temperature of space: about 3 degrees C above absolute zero. The heat from stars will not add much to that.

Answer 5

The sun wont explode right away. It will become a red giant first like betelgeuse swallowing all the inner planets. One of our options of survival if flying to mars. Then i dont know how long would it take for a suppernova to occur then even mars would be doomed. is there really such a thing as an absolute zero in the thermometer??? anyway i believe it would be really cold. we would freeze

Answer 6

If the sun "blows out" it will take the Earth with it, so relax and don't worry about stockpiling blankets in case of emergency... The whole planet will get burned to a cinder when the sun goes nova.

Answer 7

if the sun blows out (which it wont, not in a billion years at least and even then, it will take a long time to die completely), it'll be so cold, you'd die along with all the other living organisms on this earth.
thats how cold it'll be.

Answer 8

It will be absolute zero when the sun goes out, which some scientists predict will be in about 5 billion years. If and when it does, there will still be seven minutes of sunlight reaching earth after it has gone out, as it takes sunlight 8 mins. to reach earth. Plants will die, in turn things that eat the plants will die, and finally the things that ate the herbivores will die.

Answer 9

Without the sun, the average temperature in space is Zero Kelvin or -273 celsius or -459.7 farenheit.

The oceans would be frozen solid.

The good side of things is that if youre still alive, you can skate across the atlantic

Answer 10

there wouldnt be life on earth anymore if the sun blows out it would get pretty cold and plants and animals would die then humans