The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

Jan. 21. A planet parade is when several of our solar system's planets are visible in the night sky at the same time. There ...

Planetary alignments aren't rare, but they can be when they involve six of the eight planets in our solar system.

Because planets always appear in a line, the alignment isn't anything out of the norm. What's less common is seeing so many ...

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

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

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade ...

The seven planets will not be perfectly aligned, but will appear in an arc across the sky due to their orbital plane in the ...

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

Skywatchers: A six-planet alignment peaks this week as Mars, Jupiter, Uranus, Neptune, Venus, and Saturn come together for ...

Further simulations on flybys into the inner Solar System revealed one of our own planets might be flung out of the ballpark ...

Throughout January, six planets will line up in the night sky, with tonight offering the best chance of viewing the ‘planet ...