Mercury takes only 88 Earth days to orbit the sun.

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

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

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

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

A planetary alignment, or a "planet parade" according to the internet, will grace our night sky just after dusk, according to ...

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.

It will be the first time the rocket has ejected payloads in orbit. 10 mock satellites that ... regarding its own launch plans for the Red Planet. In November, a new study suggested China leave ...

Hot Jupiters are planets with masses similar to that of Jupiter, but orbit close to their star, at a much smaller distance than Mercury is to the Sun ... seemed all the more solid as there ...

A rare celestial event where seven planets align is visible in the UK skies. Discover how, when, and where you can observe ...