No one knows what the plan­et Gliese 667Cc looks like. We know that it is about 22 light-years from Earth, a jour­ney of life­times upon life­times. The plan­et is big­ger than our world, per­haps made of rocks instead of gas, and with­in its star’s “hab­it­able zone” – at a Goldilocks dis­tance that ensures enough star­light to make liquid water pos­sible but not so much as to nuke the plan­et clean.

via wired.com