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.

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

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

It's not especially remarkable for a few planets to line up in the sky, but the sight of four or five brilliant planets at once is less common, according to NASA. How does the ali ...

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

In the depth of winter, a sweeping view of our solar system will glow in the night sky. In total six planets will be visible, ...

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

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...

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

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Although it's being mistakenly promoted as a "rare planetary alignment," one of the best "planet parades" in half a century ...