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

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

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 ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course.

Hernandez runs the planetarium at UTRGV and says all the planets in our solar system will be visible tonight. Six planets will be visible to the naked eye and eight can be seen if you have a telescope ...

From west to east, Saturn, Venus, Neptune, Uranus, Jupiter and Mars will make an arc across Wyoming’s night sky in a parade ...

Here's everything you need to know about the stunning parade of planets lighting up the night sky this winter. A six-pack of planets will line up and light up the night sky this month, folks.