Mercury takes only 88 Earth days to orbit the sun.

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

When looking at our solar system, the planets going around the sun seem to be set up in a pretty organized fashion. They are ...

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

Although the occurrence climaxed on Jan. 21 with a conjunction—close alignment—of Saturn and Mercury, the planetary parade ...

Four planets will be widely visible to the naked eye through part of February, but calling them a 'planetary alignment' may not be the full picture.

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.

A planet parade is when several of our solar system's planets are visible in the night sky at the same time. There will be six planets visible this time around ... close to the sun right at ...

Astronomy fans know 2025 kicked off with a meteor shower, but another big spectacle is coming up that should be on your radar, too. Here’s what to look forward to and how to watch ...

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 ...