Since the 1970s, spacecraft have been visiting the solar system's distant planets, returning photos of turbulent atmospheres, colorful rings, and bizarre moons. Here are the best photos of our ...

While these planets in our solar system are incredibly cold, there are even chillier places in the universe. The coldest of all is the Boomerang Nebula , a cloud of dust and gas 30 million billion ...

Jupiter moons Callisto and Ganymede are among the biggest in the solar system, and potential grounds for liquid water and alien life. NASA's JUICE mission will probe them for signs of both.

On the outskirts of the solar system, Uranus is accompanied by at least 27 moons. We explore these strange tilted moons in more detail.