Could a reactionless, gravity-defying propulsion system actually work? A former NASA engineer says yes, but scientists are skeptical.

YR4, it appeared, was heading for Earth but more data recorded by the Webb Space Telescope has offered new information about ...

Martian dust might look harmless from millions of miles away, but up close, it could pose a serious threat to your health. As ...

A huge asteroid that was briefly feared to strike Earth now has a nearly 4% chance of smashing into the Moon, according to new data from the James Webb Space Telescope.

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A solar wind event from 2017 that hit Jupiter and compressed its magnetosphere created a hot region spanning half Jupiter's circumference.

Scientists say a vast, Earth-sized region of unexpectedly high temperatures in Jupiter's upper atmosphere was caused by a massive wave of solar wind.

That’s exactly what NASA astronaut and the talk of the town Sunita Williams experienced when she shared a heartwarming video ...

The same dirt that clings to astronauts' boots may one day keep their lights on. Researchers created solar cells made out of simulated Moon dust. The cells convert sunlight into energy efficiently, ...

The astronauts who were left stranded on board the International Space Station revealed their near-death experience.

NASA said the telescope is expected to collect data on more than 450 million galaxies and more than 100 million stars in the Milky Way by surveying the entire sky in 102 infrared wavelengths.

The SMITHSONIAN ASTROPHYSICAL OBSERVATORY is a part of the Smithsonian Institution which, in conjunction with the Harvard ...