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 ...

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

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

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

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

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

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

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

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

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

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 ...

The research, yet to be peer-reviewed, sheds light on what could have changed the orbits of several planets in the solar ...