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

The solar system consists of stars, the Sun, 8 planets, dozens of moons, millions of asteroids, comets, and meteoroids. It orbits the centre of the Milky Way galaxy at about 515,000 mph.

so we launched spacecraft like the Voyager 1 and 2 probes and NASA's various solar orbiters to study the Sun's effects on the ...

The eight planets in our solar system orbit the sun in roughly the same plane, because they all originally formed from the same disc of debris around the sun. The line the sun traces across the ...

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.