Will our sun ever become blue giant or red giant?

Answer 1

Yes. Quite a bit. While we not to sure how hot it will get, in the next 300 million years or so we expect the Sun to either move to the spectral class of G5V-G7V, which in laymen terms means the sun is going to be more Yellow/Orange over the next 300 million years. In a billion years the Sun will have probably reached K1V-K3V or K1IV or K3IV depending on how much larger the sun is at this point. If it has reached a solar radii of 2 or 3 then it will gain the IV tag (Sub Giant) a prime example of a sub giant is the near by star Procyon A which is a F5IV class star. At this point though Life will have extinguished on earth as our oceans have evaporated, but where life ends new life begins, As Jupiter's Moon Europa will be sitting in the Habitable Zone of the Sun. Also during this time an aging Alpha Centauri A will become the brightest star in the night sky "already the brightest star in the Southern Hemisphere" possible out shinning Venus at this point. The Sun will begin going through it's final stages of life starting 2.5 billion years from now and ending 5.4 billion years from now where the sun will move away from K9III to a M1III spectral class and the sun will have finally reached it's red giant phase and at this point the sun will be a huge 100+ solar radii and engulfing most of the inner planets if not all of them. Also this will be the point where the solar system has lost its "habitable zone" do to the huge amount of radiation M class stars produce. For example the nearest star to us Proxima Centauri is a tiny red dwarf that's roughly the size of Saturn can produce more deadly radiation in a day then our sun does in several years(rough estimate) At the end of our Suns life 4.5 billion years from now it will go out with sort of a whimper, For the sun doesn't have enough mass to go supernova. Rather the sun is just gonna shed it's skin so to speak in a process that's simply called a "nova" and create a planetary nebula where whats left of our solar system is. Thus the process begins again and new stars and new planets will be born from the ashes of the sun.

Answer 2

It is expected that the Sun becomes a red giant in about 5 billion years. Even before that, it will gradually become hotter; in about a billion years, it will no longer be possible for life, as we know it, to survive on Earth.

It is expected that the Sun becomes a red giant in about 5 billion years. Even before that, it will gradually become hotter; in about a billion years, it will no longer be possible for life, as we know it, to survive on Earth.

It is expected that the Sun becomes a red giant in about 5 billion years. Even before that, it will gradually become hotter; in about a billion years, it will no longer be possible for life, as we know it, to survive on Earth.

It is expected that the Sun becomes a red giant in about 5 billion years. Even before that, it will gradually become hotter; in about a billion years, it will no longer be possible for life, as we know it, to survive on Earth.

Answer 3

That's still about four BILLION years from now; none of us will be alive, and it's vanishingly unlikely that the human race will still exist in any form that we might recognize as "us". So the question is probably moot.

However, if something descended from Man still resides on the planet Earth, it is far more probable that we would simply move the Earth, complete, either outward in the solar system to a safe distance, or move the Earth to orbit a new younger star. Perhaps an artificial one, built to our exact specifications.

Alternatively, within the next few BILLION years, it is quite possible that we will have developed techniques of stellar rejuvenation; removing the excess helium and replacing it with a fresh supply of hydrogen to keep it burning just as it is now, for eons into the future.

And perhaps this quote would be appropriate at this point: "If man survives ... then for all but a vanishingly brief instant near the dawn of history, the word 'ship' will mean 'spaceship.'" Arthur C. Clarke

Answer 4

Its a good question. The moon is slowly receding from the Earth at a rate of around 3.8 cm per year, though this would stabilise over 50 billion years or so as the length of the Earth Day becomes longer. Additionally, the increased heat from the sun as it nears the end of its life will vapourise the oceans, meaning that the tidal effects will no longer come into play and the moons distance from Earth wont increase anymore. This will happen in around 2.1 billion years or so, with the Earth and moon being swallowed up by the expanding sun soon after, so any developments with the Earth-Moon system may not occur.

Answer 5

It is expected that the Sun becomes a red giant in about 5 billion years. Even before that, it will gradually become hotter; in about a billion years, it will no longer be possible for life, as we know it, to survive on Earth.

Answer 6

Leaving aside the time factor, the Earth will have been totally destroyed, so the answer must be "NO". But if we did it would cover up half the sky during the day!!

Answer 7

Our Sun is a medium sized star; yes, but it's a little larger than average.

Answer 8

The average temperature wont be any different in the next million years, this is a very small timeframe for the life of our sun which is billions of years old.

Answer 9

It will be cooler but much larger.