It's hard to remember now, but there was a long period of time in which scientists weren't sure how many planets might actually exist throughout the galaxy, much less how likely it might be to find a ...

Engineers have designed a compact, battery-powered radio probe that could help unlock the secrets of alien planets. The proposed small probe, known as the Gravity Imaging Radio Observer (GIRO), would ...

The search for Earthlike, habitable planets beyond the Sun has been something like a boulder rolling downhill ever since the Kepler space telescope went into orbit in 2009. Before that, ground-based ...