This puzzling object is the wrong shape for its type.
New research suggests that an Earth or Mars-sized world is shaping the Kuiper Belt.
The HiRISE camera caught a picture of the rover as it made its way across Mars.
Like a flame to a candle, HOPS 108 is not burning bright thanks to its big sister.
Mount Graham, home to the Large Binocular Telescope, is in danger.
The final catalog could double the number of known habitable exoplanets if confirmed.
After three years, astronomers have ruled out a third body in this close-by star system.
New research suggests a gradual accumulation of dirt and ice made the seven icy planets.
The result confirms our current theory of white dwarf physics.