A new study led by University of Idaho researchers suggests there could be two tiny, previously undiscovered moonlets orbiting near two of the planet's rings.
The moon experiences a heavier bombardment by small meteoroids than models had predicted, according to new observations from NASA's Lunar Reconnaissance Orbiter (LRO) spacecraft.
Researchers have demonstrated for the first time how an asteroid or comet could have caused a mega crater on Mars' largest moon Phobos -- which resembles the Death Star from the film "Star Wars" -- without completely destroying the satellite.
NASA will host a teleconference at 2 p.m. EDT Monday, Sept. 26, to present new findings from images captured by the agency’s Hubble Space Telescope of Jupiter’s icy moon, Europa.