The top quark is about 100 trillion times heavier than the up quark. But why?
A beautiful image of the Milky Way's closest galactic neighbor provides insight into how stars form.
Scientists with NASA will unveil the latest climate trends and global temperature measurements for Earth today (Feb. 6) and you can follow the announcement live online.
'Oumuamua is long gone, but it's still leaving scientists guessing. A new explanation proposes that the strange object was a "monstrous fluffy dust aggregate" produced by a busted-up comet.
As the National Science Foundation (NSF) recovers from a five-week partial government shutdown, the agency is already starting preparations for another potential shutdown.
NASA's InSight lander dropped an insulating cover over its Marsquake-sensing seismometer on Feb. 2, mission team members said.
Scientists peering at an alien solar system have spotted a pair of planets so different that their traits may be evidence of a massive collision.
There's a giant void hiding under the Antarctic ice, and it's growing larger and more menacing by the day, a new study using satellite data finds.
Americans across the Midwest and Northeast can agree on one thing — it's really, really cold this week — and a NASA satellite monitoring air temperatures confirms the sentiment.
A NASA scientist has visited a four-year-old island that satellites watched rise out of the waters — a rare opportunity to see in person a new island that lasts more than a few months.
Crashing a giant space rock into a young planet can strip off some or all of its atmosphere, creating a wealth of different types of worlds.
The Hubble Space Telescope has discovered a dwarf galaxy in our own cosmic backyard, a mere 30 million light-years from the Milky Way.
NASA's Mars rover Curiosity has flexed some new scientific muscles, apparently solving a Red Planet puzzle in the process.
The main contractor for the Chinese space program is planning more than 30 launches in 2019, with major missions including the crucial return-to-flight of the heavy-lift Long March 5 rocket in July.
NASA's Hubble Space Telescope captured a stunning new view of a spiral galaxy that wandered too close to the massive Coma galaxy cluster and is being stripped of its gas.