No matter how many missions to Mars she takes part in, the sheer joy of unearthing discoveries about the red planet never ...

Two gigantic canyons on the moon — both deeper than the Grand Canyon — were carved in less than 10 minutes by floods of rocks ...

One photographer put the age of starlight into perspective with stunning projections on some of Earth's oldest rock ...

Mercury joins the night sky to complete a seven-planet alignment just after sunset for the end of February. Saturn leaves our ...