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Signs Found of Many “Super-Earths”
Jupiter-like exoplanets are outnumbered by smaller planets three to one, say astronomers describing their cutting-edge work in progress.
Jupiter Sports a Third Red Spot
Jupiter's new spot may herald global climate change for the gas giant.
Mars Rover Unearths Ancient Hot Springs
The Mars rover Spirit uncovers evidence for hydrothermal activity on the Red Planet and a possible cache for microbial fossils.
Puny Star's Big Flare Wows Astronomers
While a NASA satellite looked on, last month a red dwarf in Lacerta erupted with a titanic — and unexpected — burst of energy.