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

The James Webb Space Telescope has captured its first direct images of carbon dioxide in a planet outside the solar system in ...

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

At first glance, the night sky appears still. But in reality, everything moves, our Solar System being no exception. As it ...

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

One million alien visitors from another star system could already be lurking in the solar system. We aren't talking about ...

With the new spottings, Saturn has usurped Jupiter which has 95 known moons, while Uranus (28) and Neptune (16) remain third ...

Researchers are still not sure how old the moon is. However, there is now growing evidence that it is almost as old as our ...

If we achieve advanced nuclear, antimatter propulsion or other advance propulsion it would be possible to achieve near ...

Even the little-understood Oort Cloud, at the outer edges of our solar system beyond view, has a partly spiral structure.

Interstellar material has been discovered in our solar system, but researchers continue to hunt for where it came from and ...

The James Webb Space Telescope has captured its first direct images of carbon dioxide in a planet outside the solar system in ...