Today In The Space World on MSN

The solar system explained - planets, moons, and hidden wonders

The Solar System is far more than a simple lineup of planets around the Sun. Worlds, moons, asteroids, comets, and strange ...

Planet Earth, explained

Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known universe confirmed to host life. With a radius of 3,959 miles, Earth is the ...