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

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but get a telescope and you can spot Neptune and Uranus.

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.

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

Baker said that there are other astronomical events that may be more interesting than the parade of planets. Baker said Mars ...

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

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

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

Tonight and throughout January, stargazers can see a planetary alignment in the night sky or what some are calling a ...

In the early evening, look to the southwest and you'll see Venus (the brightest object in the sky after the Sun and Moon) and ...

Starting up again Saturday, a sweeping view of our solar system will glow in the night sky. The planetary alignment, or a ...