Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object ...

It may sound apocalyptic, but a newly detected asteroid nearly the size of a football field now has a greater than one ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

An object we thought belonged to the most common category of planet in the galaxy has turned out to be something we've never ... Subsequent observations revealed a substantial atmosphere. A size ...

Stargazers who have heard of an amazing planetary alignment coming later in January may be in for a letdown if they look up at the night sky expecting to be dazzled. Yes, six planets will be ...

An object eight ... system's planets onto a different course. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A planet-size object that ...

Here's what to know. Despite what some reports suggest, the upcoming planetary alignment won't be all that special. The planets will appear to line up — but no more than usual. The planets in ...

Observing the planets is one of the most awe-inspiring ways to witness the magic of the night sky—and there’s no better way to view them than in a planetary ... roughly the size of a fist ...

The solar system consists of 8 planets, including Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Each planet has its own unique characteristics, such as size, composition ...

Here’s how it works. Four bright planets are visible together in the night sky this month in what NASA calls a "planetary parade" that is a must-see for stargazers. Venus, Mars, Jupiter and ...

25, Mercury will briefly join the planetary parade, creating a rare lineup of all seven planets visible from Earth. However, spotting Mercury will be challenging due to its small size and ...

Of course, unless you’ve been living under a rock since 2006, you also know that now we only have eight planets ... Planet Nine that might be out there is between, like, five and 10 times the ...