If our Moon suddenly vanished, Earth would already face dramatic consequences. But replacing it with entire alien worlds ...

Most planets will be visible to the naked eye, but two will require binoculars or a telescope.

Who’s ready for a “planet parade”? The last planetary alignment was in August 2025, when six planets aligned and four were bright enough to be seen without a telescope. Next week, Mercury, Venus, ...

Six planets will appear close together after sunset in a rare planetary parade. Here is how and when to see this beautiful ...

A rare planetary alignment of six planets will light the horizon this weekend. Here's when where, and what time to see 2026 ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Sky-watchers who saw the Venus-Jupiter conjunction on ...

Some of the planets in our Solar System are gigantic. But what if they got even bigger? Let’s go up the planetary size chart and see what kind of chaos doubling the size of every planet would make.