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.

Planetary scientists have long debated where the material that formed Earth comes from. Despite its location in the inner ...

The decades since scientists confirmed the first planet around another star have been rich in discovery, but it’s rare to see ...

Illustration comparing the planets of the Solar System and the Sun on the same scale. The planets are shown to scale relative to each other but their distances are not. From left to right the bodies ...