Stargazers will be treated to a dazzling six-planet "alignment" this January.
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 ...
When you first learned about the Solar System, you probably saw diagrams that made it look orderly, with planets arranged in ...
An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...
Planetary alignments aren't rare, but they can be when they involve six of the eight planets in our solar system.