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Space travel destination: Gliese 581g
Gliese 581g has everything you'd want in a space destination. According to The Awl, "it's around three earths, it's probably not made of gas, it could conceivably hold on to an atmosphere, and it's at the right distance from its star, Gliese 581, to have liquid water on the surface." Get ready for a bit of extreme heat, though: "half of it may or may not be always a 70°C degree daytime and the other half, a -35°C degree night."
The temperatures may be a bit rough, but I'd still book a ticket for this trip.
[photo by BlatantWorld.com via Flickr]