Neptune, the other blue planet, is the eighth planet in our solar system. Neptune is an ice giant.
Jupiter's Great Red Spot — the most powerful storm in the solar system — is at its smallest observed size yet, and scientists aren't sure why.
Voyager 2, arriving at Jupiter four months after Voyager 1, was actually launched 16 days before its mate.
In the star cluster NGC 6811, astronomers have found two planets smaller than Neptune orbiting Sun-like stars, as seen in this space wallpaper.
Practically all sun-like stars have planets, and one in six has a planet the size of Earth, scientists say.