Sierra Space, the company behind the in-development Dream Chaser spaceplane, announced a technology center expansion that will allow it to scale its solar power systems manufacturing. The $45 ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

The icy giant is more than 10 times the size of any known comet, according to the National Radio Astronomy Observatory.

In the outer reaches of our solar system, far beyond the orbit of Pluto, lies Sedna, one of the most mysterious objects ever ...

NASA's Voyager Spacecraft Discovers a 'Wall of Fire' at the Edge of Solar System NASA has always strived to solve the ...

Just weeks after Sierra Space Corp. publicly launched operations at a manufacturing facility in Centennial, the aerospace ...

Solar System Planets. Astronomy articles on the eight planets, plus the two dwarf planets, Pluto and Eris. Great pictures of everything in the solar system. Updated daily.

For years, astronomers have been searching for a mysterious ninth planet lurking in the dark outer reaches of our solar ...

The Voyager probes we sent from Earth back in the 70s found an incredible 'wall of fire' at the edge of our solar system ...

The exoplanet, a planet beyond our solar system, has been dubbed TWA 7b after NASA's James Webb Space Telescope captured evidence of it.

Researchers in the US have suggested there is a 40 percent chance a ninth planet could exist in our solar system. Planet Nine ...

NASA captured an image of the sun emitting a powerful solar flare that could interfere with technology on Earth.