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 ...

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

Have you ever wondered why the planets in our solar system align along a flat plane? Discover the science behind this cosmic arrangement, from the formation of the protoplanetary disk to the forces ...

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.

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 ...

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 ...