The best-ever photos of Ultima Thule have made it down to Earth, and they heighten the intrigue about the frigid and faraway world.
We know now what NASA science gear will fly on the first private moon landers, which could launch as early as this year.
Young stars can hide, but Hubble's good at seeking them out. The famed space telescope spotted the "smoking gun" of a newborn star about 1,000 light-years away from Earth.
Are those really baby frogs swimming out from the sun? A NASA spacecraft spotted jets shaped like tadpoles in regions of intense solar magnetic activity.
The Hayabusa2 spacecraft successfully nabbed bits of the 3,000-foot-wide (900 meters) asteroid Ryugu today (Feb. 21), Japan Aerospace Exploration Agency officials announced.
Last summer, scientists announced the discovery of a dozen new moons orbiting Jupiter. But now comes the hard part: naming them.
The asteroid or comet that smacked into Earth 66 million years ago might not be the only culprit behind the dinosaurs' demise.
Japan's Hayabusa2 spacecraft is touching down on an asteroid called Ryugu to grab a sample — and you can watch the action live.
Surprise! New pictures show two symmetrical streaks hiding in the sulfuric acid clouds close to the surface of Venus.
As humans, we rely on water, and that will be no different during long-term space exploration — which is why scientists are investigating how and where water forms elsewhere in the solar system.
Tiny wisps of Earth air stretch way out into deep space, far beyond the moon's orbit, a new study suggests.
We may not have to wait much longer to get our first glimpse of E.T., NASA chief Jim Bridenstine said.
This cluster of stars has been visible for a long time, but scientists only just now realized they're part of the same cosmic river.
The 4-year old MAVEN mission will start making elliptical orbits closer to Mars' surface and prepare for its role as a future data-relay system for NASA's upcoming Mars 2020 rover.
An appropriation bill signed into law Feb. 15 gives NASA $21.5 billion for fiscal year 2019, $1.6 billion above the administration's original request.