The discovery of hundreds of new objects in the outer solar system confirms weird gravitational effects that could be caused by “Planet Nine.”
Inspiration4, the first orbital mission with no professional astronauts, is scheduled to launch on Wednesday evening, Eastern Time.
These hypothetical bubbles could help explain the birth, and ultimate fate, of the universe.
The Morse code riddle was reminiscent of another recent Easter egg embedded in a Mars rover’s parachute.
A new study has "cast serious doubt" on a ubiquitous galactic feature that may require exotic physics to explain.
The concerning event on Thursday is the latest in a series of problems with Russian modules on the International Space Station.
The asteroid Kleopatra and its two moons have resisted explanation for more than a decade—until now.
The newly discovered signals flash for weeks at a time and can stop in just a day, a pattern that has no clear explanation.
OSIRIS REx scientists talk about asteroid Bennu, one of the most hazardous known space rocks, in the latest episode of Motherboard’s “Space Show.”
The rare phenomenon, known as a Herbig–Haro (HH) object, put on a spectacular light show.
A new five-year plan highlights an 'urgent need' to develop megaprojects in space, such as human habitats and space-based solar power plants.
Never-before-obtained observations of a periodic fast radio burst revealed surprising results that have upended expectations.