Nearly 4.5 million years ago, two enormous, blazing stars swung close to the solar system. They did not touch the sun, but they came close enough to leave a permanent mark on the thin mist of gas that ...

Humanity has learned to fling machines to the edge of the solar system, but the stars remain stubbornly out of reach. The same physics that lets us orbit Earth and land probes on distant worlds also ...

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.

Astronomers have spotted two planets forming around a distant infant star, offering a time capsule into see what the ancient solar system looked like.