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

Stargazers will be treated to a dazzling six-planet "alignment" this January.

While planets circle the sun in what's called and heliocentric orbit, they rarely fall together in what appears to the human ...

Long ago, a planetary object eight times the mass of Jupiter may have once visited the solar system and altered […] The post ...

February will be an awe-inspiring month for astronomy enthusiasts who will be able to the see the solar system's planets ...

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.

Mercury joins the night sky to complete a 7-planet alignment just after sunset for the end of February. Saturn leaves our ...

A planetary alignment, or a "planet parade" according to the internet, will grace our night sky just after dusk, according to ...

NASA has shared details of what to look out for in the night sky this month, with the moon appearing alongside a parade of planets.

HELENA — The planets are aligned. Six planets, Mars, Jupiter, Uranus, Neptune, Venus and Saturn can be seen in the night sky.

Worlds will align for a "planetary parade" in January, with four bright and easily visible to the naked eye. But an even ...