The first all-female spacewalk in history won't be happening this week after all due to a last-minute crew swap, NASA announced today (March 25).
For the first time ever, astronomers have witnessed the birth of one of Neptune's enormous 'Great Dark Spot' storms.
Northrop Grumman has named its next space station resupply ship after an astronaut who died in NASA's pursuit of the first moon landing.
The National Space Council will likely press NASA at its upcoming meeting to speed up its plans to return humans to the moon.
Observations of the most distant galaxy ever identified revealed traces of oxygen from at least one previous generation of stars, a sign that star formation got off to an early start.
Here's a guide to the major astronomical events of the next year, as well as space launches and milestones for spacecraft already in travel.
Colorful cosmic "fireworks" decorate the night sky over the La Silla observatory in Chile in this gorgeous image by the European Southern Observatory's resident astrophotographer Petr Horálek.
Our world is full of chemicals that shouldn't exist. New research could explain why they exist anyway.
The Milky Way stretches across the early-morning sky in these glistening views captured by astrophotographer Sérgio Conceição in Campinho, Portugal.
Thanks to the Apollo missions, scientists have their hands on hundreds of pounds of lunar rock right here on Earth. But because of a twist of fate, it isn't quite enough to solve a major puzzle.
The small-satellite launch company Rocket Lab called off the planned flight of an experimental satellite for the U.S. military Sunday (March 24) due to a video transmitter issue.
Rocket Lab is counting down to its first flight of 2019, an experimental satellite for the U.S. military, and you can watch it live online today (March 24).
A Rocket Lab Electron booster will launch the military R3D2 space antenna prototype satellite today, March 24, from New Zealand.
On March 25, 1655, Saturn's moon Titan was discovered by the Dutch scientist Christiaan Huygens. See how it happened in our On This Day in Space Video Series.
Neutrinos are the changelings of the subatomic world, but physicists are getting closer to pinning down the particles' true identities.
Scientists recently unraveled a physics puzzle that has stymied experts since the dawn of quantum mechanics.
NASA science instruments are flying to the moon aboard two international lunar missions, according to agency officials.