For ages, Earth has been known as a blue planet, a vision largely shaped by the vast oceans that cover three-quarters of its ...

Webb has two decades ahead of it, but it's already captured some stunning images. Here are 35 of our favorites.

A newly discovered green comet tracked by telescopes has likely broken apart as it swung by the sun, dashing hopes of a naked ...

Possible dark galaxy discovered near Milky Way Emits no visible light, made of hydrogen and dark matter Detected using Green ...

NEW YORK -- A newly discovered green comet tracked by telescopes has likely broken apart as it swung by the sun, dashing hopes of a naked-eye spectacle.