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http://space.com/scienceastronomy/060612_gas_comet.html

well, sort of

It just resembles a comet, while we acknowledge comets as being made of ice this one is made of gas.

Not only that, but it's breaking apart, and possibly becoming fuel for the stars.

That's just the summary of it, I'm not gonna write down all the details, I'll let you look at the link.

Well it's not a good thing for anyone in its way. At 84 million Kelvin (I think) that will char the Earth to a cinder. Luckily it's moving away from us at 11,000miles/s so it's not likely to collide with us. It's also about 3 million lightyears across which is 30 times the diameter of the Milky Way.

whoa. that's really cool. Thanks for that link. I never heard about that until now. 3nodding

84 million degeres Kelvin is pretty hot... but then again what is it density? If it's not very dence then it could pass right by the earth and we'd never know.
Like the corona of the sun. It's the most outer layer and sometimes can extend a good percentage of the way towards the earth, and it's _millions_ of degrees kelvin as well. The key is though, that the corona isn't very dence (not very many particles per square meter) so that means it won't _feel_ hot to us on earth.

... I wonder how dence this "comet" is...