A planet that in theory - can house people! It's called the Gliese 581d, it's about double the size and seven times the mass of Earth and the temperature is just right, because water doesn't vaporize nor does it freeze!

If we ever DO get there, it will really weird. The denser air and thick clouds would keep the surface in a constant murky red twilight. And thanks to it's mass (no offense Gliese) surface gravity is double Earth's.
And to people still rooting that one day we will reach it:
Not a chance.
If we could find a way to boost our spaceships into travelling at close-to-lightspeed..getting there would still take more then 20 years!
~Out