Mercury is the closest planet to the sun, followed by Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Mercury orbits ...

Worlds with liquid water could have formed just 200 million years after the big bang from the remains of the earliest ...

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

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

Exoplanets have captured the imagination of the public and scientists alike and as the search continues for more, researchers ...

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

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.

The formation of our solar system from a singular nebula raises an intriguing question: why did each planet develop with a ...

For decades, astronomers have debated how the solar system's planets formed. However ... circles that are arranged concentrically around the sun and lie on the same plane. (If you viewed them ...

Although it's being mistakenly promoted as a "rare planetary alignment," one of the best "planet parades" in half a century ...