Astronomers may have unknowingly discovered rocky planets with rings, which they may have mistaken for other kinds of worlds, a new study finds.
Legal experts are now developing a manual on how Earthbound laws might apply to wars in outer space, in the hope of deterring such conflicts from happening.
This is a serious question, and serious scientists are speculating about what traces these potential predecessors might have left behind.
Worlds with twin suns, like Luke Skywalker's fictional home Tatooine in "Star Wars," may be rare because closely paired stars gravitationally hurl planets away from them, a new study finds.
Any alien civilizations born on "super-Earth" planets may be ground-bound by their home worlds' powerful gravity, a new study suggests.
The solar system recently received its first interstellar visitor, 'Oumuamua, and researchers have now suggested a plan for a mission to meet the next guest from another star.
A swarm of thousands of black holes may surround the giant black hole at the heart of our galaxy, a new study finds.
Scientists have discovered a metal-heavy cannonball of an exoplanet resembling an Earth-size version of Mercury.
The rise of the largest volcanoes in the solar system may have led Mars to possess oceans hundreds of millions of years earlier than previously thought, a new study finds.
Rogue moons, torn from their planets and flung outward to drift through space, may be as common as stars in the universe, a new study finds.
R2-D2 and BB-8 are the droids that NASA is looking for — "astromechs" that can help repair spaceships on the fly, a NASA robotics engineer says.
Cyclones encircling Jupiter's poles mysteriously arrange themselves in clusters with pentagonal and other geometric shapes, a new study finds.
The colorful stripes of Jupiter run hundreds of miles deep and hold so much gas that their mass is about three times that of the entire Earth, three new studies find.
The origins of "pulsating auroras" — intense flickering displays of light high up in Earth's atmosphere — are now revealed after a decades-long hunt, a new study finds.
A new software program that uses artificial intelligence can help rapidly detect and analyze gravitational waves, or ripples in the cosmic fabric of space-time, a new study finds.
New research may have identified an early warning sign of how powerful explosions from the sun might get, shedding light on whether they could damage communication satellites and power grids.
New work probes the extraterrestrial source of incredibly powerful explosions of radio waves, investigating why that spot is the only known location to repeatedly burst with these blasts.
Technology in development could capture images from an Earth-size planet in the nearby Alpha Centauri system in the 2020s, new research suggests.
Heavyweight stars up to hundreds of times the mass of the sun may be more abundant than previously thought, a new study finds.