If humanity ever truly felt our existence threatened by an asteroid, we may not be able to smash the looming space rock into pieces after all.
A distant alien world that was potentially on its way into exile in interstellar space was rescued by the gravitational pull of a passing pair of stars, a new study argues.
Scientists found valleys, channels, ridges and curved deltas in the depths of Martian craters, and those features provide the first evidence of a vast groundwater system in the planet's past.
The 'mole' aboard NASA's InSight Mars lander has encountered stiff resistance on its first subsurface sojourn.
NASA has selected a space weather experiment to fly to the International Space Station as the agency's heliophysics program seeks to strike a balance between large and small missions.
Astronomers have spotted a puzzlingly old, dusty white dwarf star, the remains of a star like our own sun, that may change their understanding of how white dwarfs influence their environments.
Planet Nine will probably be detected within a decade or so, if the putative world does indeed exist, a new study suggests.
Sometime in the last decade, something heavy slammed into the Martian atmosphere and blasted apart into a hard rain of superheated material.
The Red Planet makes a close approach to the blood-red moon in this photo taken during the longest total lunar eclipse of the century, on July 27, 2018.
Carbon dioxide emissions could wipe out one of Earth's most common types of clouds. That's bad news.
The first-ever interplanetary "mole" is about to start burrowing into the Martian surface — but this mole is purely mechanical, and it would flounder on any other world.