Astronomers have announced the discovery of what appears to be an " ice cold Earth ," a chilly but potentially habitable rocky world similar to our own located less than 150 light-years away. As described in a recent study , this excitingly Earth-like exoplanet candidate, named HD-137010 b, may be slightly larger and about 1.2 times as massive as our planet. The length of its year may also be equal to ours, since it appears to swing around its mellow, orange star every 355 days. Judging by the