For the first time ever, scientists have directly spotted a pair of supermassive black holes orbiting each other, a new study suggests.
For decades, while astronomers have detected black holes equal in mass either to a few suns or to millions of suns, the missing-link black holes in between have eluded discovery.
A new understanding of how jets of plasma explode from the surface of the sun could help scientists crack one of the biggest mysteries surrounding our nearest star.
The universe was born with the Big Bang as an unimaginably hot, dense point. SPACE.com offers an overview of the universe and its history, age and structure.
Fusion-powered rockets that are only the size of a few refrigerators could one day help propel spacecraft at high speeds to nearby planets or even other stars, a NASA-funded spaceflight company says.
Metal detected in the sky of Mars may come from meteors streaking through the Red Planet atmosphere, a new study finds.
Mouse sperm preserved on the International Space Station for nine months gave rise to healthy pups, a new study finds, suggesting that people could one day reproduce safely in space.
The majority of antimatter that pervades the Milky Way may come from clashing remnants of dead stars, a new study finds.
Neptune is the farthest planet from the sun and was the first to be predicted before it was discovered.
A giant meteor impact on Earth nearly 2 billion years ago triggered more explosive and long-lived volcanic eruptions than previously thought, a new study finds.
Unlike anywhere else in the solar system, Saturn's moon Titan is brighter during twilight than during daylight, a new study finds.
Electrified sands on Saturn's largest moon, Titan, may stick together due to static cling, potentially meaning that sand castles there would last for weeks, a new study finds.
ars once may have possessed an atmosphere about as thick as Earth's, but lost most of it to space due to solar wind and ultraviolet rays, a new study finds.
Although the invisible substance known as dark matter dominates galaxies nowadays, it was apparently only a minor ingredient of galaxies in the early universe, a new study finds.
Astronomers have found evidence of shattered asteroids orbiting a pair of stars, a strong new sign that rocky worlds with twin suns like Luke Skywalker's fictional home world Tatooine are possible.
Astronomers have discovered a neutron star 1,000 times brighter than researchers previously thought was possible for neutron stars, a new study finds.
Baby pictures of a newborn supernova have captured this stellar explosion after the first half-dozen hours of its life, shedding light on how these giant explosions happen, a new study finds.