Rahul Rao

Neutrinos are so small that scientists once thought they had no mass at all. Neutrinos do have mass, however, and physicists have now put a new upper limit on it: 0.8 electronvolts.

Even as commercial spaceflight company Axiom Space prepares to launch the first fully private crew to the space station early next year, its engineers are also developing in-house spacesuits.

The moon's crust might have formed from an unevenly layered "slush" of magma that once covered the entire body, a new study reports.

A group of physicists has measured gravity using the effects of time dilation — the slowing of time imparted by increased velocity or gravitational force — on atoms.

A year after its last launch, Russia’s newest rocket lifted off again — and things didn't go entirely according to plan.

NASA's STEREO-A satellite caught this view of Comet Leonard as it continued to streak into the inner solar system in December.

DART will be NASA's first attempt to adjust an asteroid's orbit. Here's how it works.

NASA's mission DART will test our ability to redirect an asteroid by quite literally crashing into it — but the spacecraft will also test a new type of propulsion system for the agency.

Finding a black hole isn't straightforward, and it's even harder the more distant such a behemoth is.

The Great Red Spot extends as much as 310 miles (500 kilometers) beneath Jupiter's cloud tops, data from NASA's Juno Jupiter probe shows.

NASA wants more private-sector firms to ferry its astronauts up into space, including missions to and from the International Space Station.

NASA will launch three sounding rockets from its Wallops Flight Facility in coastal Virginia on flights that local observers may be able to spot in the sky.

Astronomers have solved a mystery that the Hubble Space Telescope first discovered nearly a decade ago. A pair of streaky objects actually appear that way thanks to a "ripple" in the fabric of space.

Late Thursday night (Sept. 30) in the southeastern United States, anybody looking up could have glimpsed a brilliant streak, trailing down into the Atlantic Ocean off Florida's east coast.

There comes a time in every galaxy's life, astronomers think, when the galaxy ejects a large part of its gas, but scientists aren't certain what drives this "mid-life crisis."

Although some rocket-borne missions last years or decades, others, such as the cast of NASA's Sounding Rockets Program, do their science during a short hop that doesn't even reach orbit.

Hubble peers deep to see newborn stars in action.

Virgin Orbit has passed an FAA environmental review for future rocket launches from Andersen Air Force Base in Guam.

Thanks to data from three different Mars orbiters, scientists have determined that small, local dust storms, like their much larger counterparts, play a key role in drying out the Red Planet.

As an asteroid, Phaethon is a ball composed mainly of rock, and it shouldn't have enough water ice to form the glowing fuzzy coma and tail that adorn a comet.

Astronomers have discovered a quartet of teenage planets, according to data from NASA's TESS telescope.

The new European-American ocean monitoring satellite Sentinel 6 Michael Freilich has started delivering precise sea-level rise data after six months of technical calibrations.

Radiation exposure limits on how long astronauts can stay up in orbit. But that cap isn't equal for all astronauts, and experts are now backing NASA's effort to change it.

The "active galactic nucleus" phase of the supermassive black hole at the heart of the galaxy Arp 187 has apparently just ended.