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

"A parade of planets, also sometimes referred to as a planetary alignment, is when several planets in our solar system appear ...

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

Stargazers who haven’t had a chance to check out this month’s planet parade will want to look up soon because there’s ...

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

This month offers incredible views of six planets, including Venus-Saturn conjunction. See the dates for all of 2025's ...

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

NASA’s Voyager mission completed humankind’s first close-up exploration of the four giant outer planets of our solar system.

This may explain the strange properties of the orbits of our solar system's planets, which are not quite perfectly circular, and all lie on slightly different planes. NASA artist’s conception of ...

In 2025, there will be two partial solar eclipses. A partial solar eclipse occurs when the moon moves between the sun and ...

A planet-size object that possibly once visited the solar system may have permanently changed our cosmic neighborhood by warping the orbits of the four outer planets, a new study suggests. The ...