A distant asteroid trailing in the gravitational wake of Mars our moon's long-lost twin.
After long months with no way of making contact with Voyager 2, NASA has finally reestablished communications with the record-setting interstellar spacecraft.
Astronomers detected a fast radio burst inside the Milky Way for the first time ever, and traced it to a known magnetar.
Mark Kelly has won a seat in the U.S. Senate, making him only the fourth NASA astronaut to be elected to Congress.
New theory suggests cosmic bubbles during the birth of our universe are responsible for creating dark matter.
A new study looks at one hypothesis explaining why humans' body temperatures have been on the decline. Here's what it found.
As families tuck into their couches to watch Charlie Brown's quest for the great pumpkin this Halloween, they may be surprised to hear that NASA has already discovered a "greater pumpkin."
OSIRIS-REx finished stowing the bits of the asteroid Bennu that it snagged last week, successfully locking the material into the spacecraft's return capsule
Our sun's death is a long way off — about 4.5 billion years, give or take — but someday it's going to happen, and what then for our solar system?
'Rogue' planets are worlds without suns. Astronomers have discovered one the size of Earth for the first time ever.
At the center of a black hole, matter is compressed down to an infinitely tiny point, and all conceptions of time and space completely break down.
Roughly two to three times Earth's distance from the sun, in the Asteroid Belt that lies between Mars and Jupiter, 16 Psyche makes its home.
A fireball meteor lit up midwestern skies on Jan. 16, 2018, then landed on a frozen Michigan lake. Analysis of the space rock revealed a rich array of extraterrestrial organic compounds.
Astronomers are vetting a technique that could aid the hunt for Planet Nine, which some researchers think lurks undiscovered in the far outer system, way beyond Pluto's orbit.
As entrepreneurs spend billions on space, there is a backlash building that holds their projects as icons of extravagance, even as they may help save the Earth. This is the "Elysium effect."