It completes a navigation satellite constellation decades in the making.
A "ring of fire" solar eclipse will briefly appear in parts of Africa and Asia this weekend, and if you aren't out there in person, you can take in the spectacular show online.
It's time to suit up for "Star Wars Day" — that annual May the Fourth (be with you) fan celebration that happens on Monday (May 4). Lego has three new helmet sets to help you get in the mood.
Could Mercury's close orbit to the sun help the planet generate ice? This sounds like a paradox, but a new study shows how it could happen.
Freeman Dyson may be gone, but his famous alien-hunting idea will likely persist far into the future.
Aerojet Rocketdyne will develop "enabling technologies" for DARPA's Glide Breaker program under a newly announced contract, which is worth up to $19.6 million.
Three lunar missions, commercial spaceflight milestones, the first all-woman spacewalk — 2019 was a busy year in space for public and private entities alike.
What is it about the "Star Wars" franchise that gives it staying power throughout a generation and a half of change?
A Russian Soyuz rocket launched a top-secret military satellite designed to scope out other satellites in space on Monday (Nov. 25), according to government reports.
The tiny planet Mercury scooted across the sun's face today (Nov. 11) for the last time until 2032, and skywatchers around the world had the chance to witness the rare celestial event.
The Mercury transit on Nov. 11 will be accessible to amateur astronomers, as long as they have the right equipment to view it safely.
Gusting winds in northern California are helping the spread of the Kincade fire, as shown in a new animation from NASA.
Our home galaxy stole several dwarf galaxies that used to belong to the Large Magellanic Cloud (LMC), a galaxy near the Milky Way.
One of the year's brightest meteor showers is about to take flight. If you face cloudy or light-polluted skies at home, however, never fear — the Perseids will also be streamed online.
Presidential candidate Bernie Sanders (D-VT) says he's prepared to disclose government information about UFOs if he wins in 2020.
Japanese satellite shows where the ground was broken up and even sliced open during the twin earthquakes near Ridgecrest.
A sharp-eyed NASA spacecraft spotted the probable remains of an Israeli spacecraft that crash-landed on the moon last month.