Mercury takes only 88 Earth days to orbit the sun.

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.

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

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 ...

A new study examines how much material from the closest star system to Earth will end up in orbit around the Sun, and how ...

Four planets will be widely visible to the naked eye through part of February, but calling them a 'planetary alignment' may ...

Here’s what you should know when you go outside to see for yourself: Yes, the planets are indeed lined up across our sky. No, ...

Six planets are lining up in a row from our Earthly view of the cosmos, in a spectacle that'll be visible in January through to February.

The eight major planets of our Solar System orbit the Sun in the same flat plane ... we have discovered many planets in orbit around certain stars. Trappist-1, a red dwarf star located 40 light ...

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

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 ...

VENUS, the so-called planet of love, is set to shine its brightest all year tomorrow – coincidentally, on Valentine’s Day. The second planet from the Sun won’t glow as bright ...