Bothell, Wash.-based Portal Space Systems shows off the lab where its solar thermal propulsion system will be developed.

A superior conjunction occurs when Venus is the farthest from Earth, on the other side of the sun. Conversely, astronomers ...

Early in our Solar System’s history, bits of icy debris were scattered and then gradually coaxed into a spiral alignment in ...

Solar panels are next to useless in the outer solar system, so NASA’s Voyager probes rely on nuclear batteries—technology ...

As civilizations become more and more advanced, their power needs also increase. It's likely that an advanced civilization ...

The heliosphere, a cosmic bubble formed by the Sun, protects our solar system from interstellar threats and influences life's ...

The Radcliffe Wave is a massive, undulating structure filled with dense clouds of gas and dust, stretching across several ...

DAF is bringing solar power to the road in a smart, low-profile way—with ultra-thin, flexible panels mounted directly on ...

A new five megawatt solar array system, known as the Chippewa Sun, has gone online in the town of Hallie off of Highway 29, serving the Sonnentag at UW- Pablo Group and the City of Eau Claire. “Those ...

New connections discovered between the Sun's photosphere and CI chondrites meteorites, providing clues about the origin of materials.

Most of the long-period comets in the Solar System come from the outer Oort Cloud. The inner region is much more stable. It's ...

Astronomers have discovered four planets that are just a fraction of the mass of Earth orbiting Barnard’s Star, which is 6 ...