Martian dust might look harmless from millions of miles away, but up close, it could pose a serious threat to your health. As space agencies push forward toward a crewed mission to Mars, scientists ...

The "cosmic pinwheel" that astronomers feared could one day shower Earth with lethal gamma rays may not be as dangerous ... making the threat far less likely than previously thought.

Going where no spacecraft has gone before: NASA shuts down cosmic ray instrument on Voyager 2. Illustration. (photo credit: Merlin74. Via Shutterstock) NASA is set to shut down the Low Energy ...