In 1977, NASA launched the Voyager probes to study the Solar System's edge, and the interstellar medium between the stars. One by one, they both hit the "wall of fire" at the boundaries of our ...

This process, called accretion, is how everything in the solar system – planets, moons, comets and asteroids – came into being. Telescopes can see young solar systems being born.

This process, , is how everything in the solar system – planets, moons, comets and asteroids – came into being. Telescopes can see young solar systems being born.

Our solar system may have a ninth planet after all, researchers say. The possibility that an additional planet may be hidden far into the solar system was touted more than a century ago.

Everything you could want to know about Mercury in our solar system. China Reacts to Trump's $1 Trillion Pentagon Budget Ranking All-You-Can-Eat Chain Buffets From Worst To First Drone swarm ...

It presents the evolution of the solar system through the lens of the planetesimal hypothesis, a theory suggesting that planets formed from small celestial bodies accumulating over time.

Between February 25 and February 28, all seven planets in our solar system will be visible in the night sky. (Credit: WSET) You'll need a telescope for some of them, but you should be able to find ...

The Sun and planets of our solar system all formed from the same cloud of gas and dust, but the planets’ compositions vary with mass and distance from our star. This illustration shows the ...

Many smaller outer solar system objects appear to have orbits that are aligned in certain mysterious ways; the simplest explanation is that their motions are influenced by another, as-yet-unseen ...

Never is this more apparent than during a planetary alignment. An alignment including all of the planets except Mercury is taking place in mid-January. Uranus and Neptune, being the most distant ...

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.

The Sun is an incandescent but benevolent dictator. For billions of years, it's kept our star system well organized through the influence of its powerful gravity. All the planets revolve around it ...