Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Smaller gas giants are less likely to survive in such systems, surrounded by clashing planetary titans. With their lower ...

Alinda has made its closest approach to our planet in decades, and it's about to peak in brightness in a rare ...

But later – hundreds of millions of years in the future – a permanent, virtually ringless Saturn will become real, thanks to another process called ring rain in which gravity pulls the rings apart and ...

Yes, six planets will be visible in the January night sky. And yes, they'll be in a line. But because planets always appear in a line from our Earth-bound vantage, the alignment isn't anything out ...

Rumor has it that as many as six planets will be in a line and visible in the night sky. Unfortunately, this cosmic event may be a cosmic letdown if you're not informed of what you'll actually see ...

Earth is about to see a large planetary alignment this week, with several planets visible in the skies above to the naked eye. Six planets will make up what is unofficially referred to by ...

allowing its size and orbit to be discerned. Thanks to this method, we have discovered many planets in orbit around certain stars. Trappist-1, a red dwarf star located 40 light-years from Earth ...