Is it possible to harbor an advanced civilization on a 1.5Msun red giant star?
822093
Sure. A planet orbiting far enough from such a star could be habitable, but not for long. When I say not long, I mean not as long as billions of years. Red giants do not last for billions of years, but they do last for millions of years, we think. So such a civilization probably could not have arisen there naturally, but could have been started by space travelers from another star settling there.
104087
Have a look here,\nhttp://outreach.physics.utah.edu/labs/star_life/starlife_main.html
759134
I'm afraid its "Goodnight Vienna" for us. As this is unlikely to happen for another 5 billion years or so though, there is a fair chance that we will have blown ourselves up or evolved into something a little more intelligent and cleared off elsewhere by the time it happens.\n\nAlthough the Sun uses up around 5 million tons of hydrogen every second, it still has enough left in its core to last for another 5 billion years or so. When it finally does run out of fuel, though, it will swell up to many times its present size and become what is known as a red giant. \n \nThe outer layers of the Sun will grow to swallow up the planets Mercury and Venus and they may even reach out as far as Earth. Way before the Earth is swallowed the surface of our planet will be scorched, its oceans boiled dry and most of the atmosphere will be stripped away.\n\nAs a red giant, the Sun might be able to exist for a few more million years. During this time it will shed matter quite quickly. The solar wind will strengthen to a solar gale. Finally, the Sun may cast off most of its outer layers as a bright shell of gas called a planetary nebula.\n\nAll that will be left behind is a very hot, dense core. The Sun, in fact, will have become a white dwarf - a star no bigger than the Earth. Gradually, over many millions of years, even this small star will cool. The Sun will end its days quietly as a dimming ember in space.\n\nThe attached link shows a photo of a star similar to the Sun in its death throes.
28773
Probably just as big as it is now. Its diameter is 864,938 miles (109 times the size of Earth). \n\nThe sun is over 4.5 billion years old... so a billion years ago it was doing pretty much the same thing it is now. A lot of nuclear fusion going on. \n\nIt will stay the same size until it has used up its core hydrogen fuel, the star starts to fuse helium and eventually other elements. During this time the star will expand into a red giant or super-giant, becoming tens or even hundreds of times larger. Eventually, no more fuel will be available and the star will collapse under gravity to form a white dwarf star only a few thousand kilometres in diameter.
1033355
Yes but it will be a long time away. In 6 to 7 billion years, stellar evolution theory predicts our sun will evolve into a red giant  and will probably completely surround the Earth. I don't think I will be around then.
1020350
You might be talking about a star designated as HR8210. It's 150 light years away from us, and the estimated minimum safe distance for Earth to be relatively safe from a supernova explosion is 160- to 200 light years. HR8210 is the closest supernova danger, but it should be many millions of years before it blasts.\n\nThis website has lots more info about HR8210 --> http://www.aad.gov.au/default.asp?casid=6283
285815
The probability of life on other planets (or moons) is certainly given. Just the other day a spacecraft found liquid water and volcanic activity on Saturn's moon Enceladus. So it's quite possible there could be life, in a primitive form at least, as near as Saturn's environment.\nAs to other galaxies, we'll never know. It's too far away - we're talking millions and billions of light-years. So even if there was life in other galaxies, the information to reach us would take millions and billions of years.\nGoing there is out of the question. Mass can't even reach the speed of light, meaning that to go to the nearest star, Alpha Centauri (four light-years away), would take very long. With a Space Shuttle, you can go at 28000 kph (17,500 mph). Light travels at 300000 kilometres per second (186,000 miles per second)! This equals 1080000000 kph (675,000,000 mph).\nSo given today's technology it would take slightly more than  150,000 years only to reach Alpha Centauri.\nBetter make sure to have a good book on board with you.
555650
I suppose it would be possible in theory. You would need an insanely bright source to project anything easily visible from Earth though. Why would you even want to do that?
940470
Possible, maybe. Likely, definitely not. The problem with flare stars (I assume you're talking about red dwarfs) is that any planet that orbits one has to orbit extremely close in order to receive enough heat to have liquid water on its surface (which is supposedly a precursor to life). At this range from the star, the planet will probably experience tidal lock, which would mean one side perpetually faces the star. The main problem is that at that close a range, any flare on the star could dramatically increase the brightness within minutes. Under unstable conditions like this, it is unlikely that advanced life would have the chance to evolve, because it is thought that advanced life needs to evolve under a relatively stable climate.
770862
Well astronomers think the expansion of the universe is actually accelerating, so what you are proposing probably will never come to pass.  Anyway for a civilization to survive a "big crunch" if it happened, would have to far far far more advanced then anything we could possibly imagine.
467288
just punch in solar system on search. or constellations
857876
The stars say ... No.\n\nNo, there's not.\n\nGood luck!
1052164
Ask those living in other planets!
525655
Yes, and I can prove it mathematically:\n\nOur galaxy (the Milky Way) contains at least (by most estimates) 100 billion stars. Now thanks to the Hubble space telescope, we know for a fact that there are other solar systems out there. So let's be conservative and assume that just 1% of the stars in our galaxy have planets in orbit around them.\n\nThat's 1 billion other solar systems.\n\nNow, of those solar systems, let us assume that a further 1% have a planet that is just the right distance from the star to support life.\n\nThat's 10 million planets where life is possible.\n\nAnd if on just 1% of those planets, life actually formed, then there are 1 million planets in our galaxy that have microscopic life on them.\n\nNow let's assume that of that total, 1% have life evolve to any level of significance (creatures with a rudimentary intelligence). \n\nThat gives us 10,000 planets that actually have alien species on them.\n\nAgain, let's go with 1% and say that's the number of planets on which life developed any significant degree of intelligence and formed a civilization.\n\nThe end result is that there are at least 100 planets in our solar system that support life at least as intelligent as we are.\n\nNow, consider that our galaxy is one of an estimated 125 billion galaxies in the universe.\n\nThat gives you over 1 trillion alien civilizations scattered throughout the known universe.\n\nFrankly, it is scientifically impossible that we are the only intelligent species.\n\nAs for whether any of them have made contact with us... no, I don't believe so. You're talking about 100 planets in a galaxy of over 100 billion stars. The odds against any two of us making contact are just too great.
456739
They need to reach what is known as the 'Chandrasekhar limit'.  This occurs at 1.4 solar masses.  It's at this point that the gravity overcomes the support of the white dwarf, and it collapses, then explodes.
1029735
Its a case of get them before they get you isn't it? don't you think? What I mean is any race that has the technical superiority to get to us first would without any doubt be far more advanced so we would probably become extincted or con corded. Any beings that would travel 100s of 1000s of light years to our little planet would want to own it and we wont be able to do a thing about it.
795436
Most carbon stars are relatively low mass red giants. It seems likely that if life were to evolve on a world it would happen while the star was on the main sequence.  The giant phase is shorter and more unstable, making it unlikely to evolve life. On the other hand, any life previously evolved on a planet would be wiped out when the star went giant. \n\nIf you found an advanced civilization around a carbon giant, I think it would be a very ancient one that was able to relocate to other bodies in its solar system to adapt to the changes in its star.\n\nA carbon dwarf is another matter. Given the very long life expectancy of red dwarfs, life on a close-in planet might have hundreds of billions of years (eventually) to evolve.