A new NASA spacecraft has started tracking the particle streams that can make a massive solar flare dangerous while mapping ...

Astrophysicists are mapping a vast, hidden structure in space that appears to guide matter and radiation along a kind of interstellar highway stretching from our solar neighborhood to distant stars.

We often use the Earth's 24-hour rhythm to keep track of time, but time changes and bends as we move through space. There are eight planets in the solar system, and they all move in a delicate cosmic ...