The hearts of small galaxies may hide a mysterious kind of black hole that has long proved elusive: medium-size black holes with masses between the mass of a few suns and that of millions of suns, a new study finds.
In a new book, this scientist says glaciers, not Neolithic people, carried the huge rocks to Stonehenge.
The Midwestern United States is ablaze in a striking new satellite video captured by a lightning-mapping instrument aboard the National Oceanic and Atmospheric Administration's GOES-17 weather satellite.
Earth would look a lot more like Mars if a mysterious mineral wasn't sucking iron out of the planet's crust. Scientists think they now know the culprit — and it's a gemstone.
Two student teams have won the Guardians of the Galaxy Space Station Challenge, a competition run by the Center for the Advancement of Science in Space and Marvel Entertainment, the organizations announced Tuesday (May 22).
Jupiter's Great Red Spot — the most powerful storm in the solar system — is an planetary icon. See photos of the giant storm, which has been shrinking over time, in our full gallery here.
A gorgeous photo by NASA's Juno spacecraft shows Jupiter as you've probably never seen it before.
Deep in the sun's core, buried under hundreds of thousands of miles of twisting and convecting hydrogen and helium, a nuclear fire rages.
According to recent reports, Amazon executives are in talks to pick up "The Expanse" — the space drama recently canceled by Syfy channel — for a fourth season.
Ceres is a dwarf planet, the only one located in the inner reaches of the solar system. It is the largest object in the asteroid belt.
SpaceX will launch two new Earth-observing satellites for NASA and five commercial communications satellites today (May 22) on an epic ride-share mission, and you can watch it live online.
A rocket built by Beijing-based company OneSpace debuted Thursday (May 17), launching from a site in northwest China and reaching a maximum altitude of about 24 miles (39 kilometers), according to media reports.
The odd shapes of the inner moons of Saturn, from ravioli to potatoes, may be due to mergers of tiny moonlets, a new study finds.
When the orbital dynamics of Jupiter's four largest moons are converted into rhythms, musical notes and time-lapsed illusions, you'll likely be astounded by what you see and hear.
SpaceX launched two new Earth science satellites for NASA and five Iridium Next communications satellites into orbit today (May 22).
Two nearby supernovae that exploded about 2.5 and eight million years ago could have resulted in a staggered depletion of Earth's ozone layer, leading to a variety of repercussions for life on Earth.
It's not just for the pros: With a little planning and flexibility, anybody can go watch a rocket blast off. Our in-depth guide goes through each of this summer's U.S. launch locations and dates.
A photo that Sally Ride autographed 35 years ago came to serve as the inspiration for her portrait on a new U.S. postage stamp commemorating her place in history as America's first woman in space.
The first scheduled passenger airline service took off from St. Petersburg, Fla.
Space exploration and astronomy have been immortalized in stamp form many times over the decades. See photos of of space-themed postage stamps from the United States and around the world here.