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

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – here’s how to spot the celestial show ...

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.

The celestial event is a notable one, mostly because we'll never see all eight planets align in ... to have clear skies, when six planets in our solar system lined up on Jan. 21, 2025, according ...

Mars, our neighboring red planet, possesses some of the most dazzling and extreme geological features within our solar system ...

The celestial event is a notable one, mostly because we'll never see all eight planets align in our lifetime ... for anyone lucky enough to have clear skies, when six planets in our solar system lined ...

Canadian astronomers have taken an extraordinary step in understanding how planets are born, using the James Webb Space ...

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

Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.

Take advantage of a special 6-7 planet alignment from Earth's perspective. Planets 'line up' in the skies over California in ...

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...