A rare alignment of two exoplanets with their star, marking one of the few known exosyzygies, an astronomical event involving ...

The upcoming year will offer a blood-red moon, spectacular meteor showers and the first glimpse of the sun’s corona since ...

From Mercury to Neptune, observers in the United States will get to see this historic planet parade known as a large ...

The universe is getting ready to show us a rare, shadowless view of the deep unknown. Earth, the sun, and the mysterious ...

Add Yahoo as a preferred source to see more of our stories on Google. Six planets will soon be aligning for a stunning celestial display. In early August, Mercury, Jupiter, Venus, Uranus, Neptune, and ...

A lucky alignment of space- and ground-based telescopes has enabled researchers to nail down the mass of a rogue planet for the first time. Unlike worlds in our Solar System, rogue planets do not ...

So far, humanity has yet to find its first "exomoon"—a moon orbiting a planet outside of the solar system. But that hasn't ...