Our satellite is a little off-balance. GRAIL data show a mass asymmetry of a few percent between its near and far sides.

Venus currently rises in the east at 3:35 a.m. local daylight time. The eerie, low glimmering of Venus is a harbinger of ...

NASA’s GRAIL mission reveals thermal differences in the moon’s mantle, explaining surface contrasts between its sides.

The large golden aura is formed from the incoming light reflected off the sun-side of the occulter, a device that blocks the ...

A much smaller 54 miles (87 km) across, Byrgius’ floor is pocked with numerous small craters ... a Full Moon and a New Moon? A Full Moon is witnessed when Earth is between the Sun and the ...

Building a sustainable economy on the moon won't be easy, but we at least have some ideas about how to get started.

c) The ice is in deep craters that stay in shadow. Planet Earth ought to be Planet Water because it’s mostly covered by the wet stuff. Like all planets, Earth orbits the Sun. But how fast is our ...

The wild-looking wheels, which can withstand extreme temperatures and conquer craters ... temperature changes between the bottom of the crater and the surface of the moon, rubber wasn’t going ...