Uranus is the seventh planet from the Sun, the third-largest planet in the Solar System, and has twenty-seven known moons.
From Caltech, in conjunction with NASA and Cool Cosmos, Ask an Astronomer answers thirteen frequently asked questions about Uranus.
Uranus is very cold, windy and, like most of the other planets, poisonous to humans. It is a gas planet like Jupiter, Saturn and Neptune.
Originally published as a CD-ROM, this site is a photo gallery of images from NASA's planetary explorations.
John Flamsteed first recorded the planet in 1690, but believed it was a star. Almost 100 years later in 1781, Sir William Hershel made the formal discovery.
Windows to the Universe is my Uranus pick of the day because they publish their material at three different levels: beginner (for elementary students), intermediate (for middle school) and advanced (for high school and college students.)
The eight planets: an explanation (including "Why does Neptune count?")
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