Officials in Washington are taking notice, investing in greater efforts to defend U.S. satellites while countering threats from China and Russia.

Residents of Half Moon Bay could face higher sewer rates after a judge ruled against the city this week in a dispute over who should pay more than $25 million to replace a water ...

Astronomers note Mercury is often difficult to see. Even Copernicus reportedly never observed it. Its proximity to the sun usually hides it, requiring careful timing for observation.

If you try to launch or land a spacecraft anywhere close to another object on the lunar surface, that object will get sandblasted with rocks, dust and sand.

Cats have been curling up in the laps of great literary minds for centuries. They have offered companionship during long writing sessions and have inspired memorable characters or even entire books.