Wed Jul 28, 2004 3:05 am by kimk
yea, sun blows up. its not 'mass'-ive enough to form a black hole, so it becomes a white dwarf. but before that, it becomes a red giant. the sun'll grow so huge it'll eat up all the planets up till probably mars, earth definitely. this is all in the life cycle of a star. you'll probably get a big nova when the thing actually blows.
but before that, the sun might actaully give out enough heat and light to 'fertilise', so to speak, the frozen planets, like neptune, or maybe some moons, like europa and its ice surface. the red giant stage, whilst not lasting as long as this current stable (middle age) stage, will still last quite a while, possibly long enough to allow life to form.
oh and back to the debate, i dont think terraforming mars would be possible, unless we also implanted the core of the planet with a uber huge electromagnet. as you know, its gravity that keeps the atmosphere intact. otherwise, all the atmospheric molecules, particularly those essentical to life like oxygen, would just gain enough energy to diffuse into space. we all know mars has a seriously weak magnetic field. so it wont be enough to sustain a full life-sustaining atmosphere. - thats my 2 cents