Meet Hippocamp, the smallest known moon of the planet Neptune. Scientists have puzzled over its origin, and over why we see it orbiting where we do. Now, new Hubble data has shed light on these mysteries.
Life on Ceres, largest body in the asteroid belt? Maybe, at one time. New research points to ancient subsurface reservoirs of salty meltwater that might have lasted millions of years and let life’s chemistry begin.
Mars has sand dunes, as Earth does. But now, NASA’s Odyssey orbiter has revealed something odd: a large dune field shaped roughly like a hexagon. The finding is expected to provide more clues as to how dunes form in Martian winds.