The hits just keep on coming for NASA's Kepler spacecraft. Today mission scientists announced that they've identified a thousand more candidate planets around other stars. One is Kepler-22 b, a world somewhat larger than Earth where you likely could walk around in shirtsleeve temperatures.
Astrobiology is the study of life’s origins and how extraterrestrial life might develop on other planets in and beyond our solar system. These news stories will introduce you to various aspects of astrobiology, from the chances of finding bacteria on Mars or in the subsurface oceans of Europa and Titan, to the characterization of habitable exoplanets. We venture into the search for extraterrestrial intelligence (SETI), such as the types of signals that advanced civilizations might use to broadcast their existence. This field of study has no extraterrestrial subjects — yet! — but that’s not stopping researchers from investigating what kinds of alien life might be possible.