An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

The eight major planets of our Solar System orbit the Sun in the same flat plane, and all at different speeds. Mercury, the ...

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

Simpson and Chen ran mathematical models looking at how differently sized Earth-like worlds would have affected the rest of ...

The eight major planets of our Solar System orbit the Sun in the same flat plane, and all at different speeds. Mercury, the closest planet to the Sun, completes an orbit – a year for the planet ...

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 ...

Mercury takes only 88 Earth days to orbit the sun.

The research, yet to be peer-reviewed, sheds light on what could have changed the orbits of several planets in the solar system.

Stargazers will be treated to a rare alignment of seven planets on 28 February when Mercury joins six other planets that are already visible in the night sky. Here's why it matters to scientists.

An asteroid that orbited near Earth for a few months as a mini-moon may be a chunk of the moon that was blasted off by an impact thousands of years ago.

They emerge from the farthest reaches of the solar system, way beyond the orbit of Neptune, then zip past the sun before disappearing again for centuries. Due to their irregular shapes and small ...