Uranus Archives -
Discovered by Sir William Herschel in March 1781, gas giant Uranus is the penultimate planet of the Solar System and currently well placed for observation in the constellation of Pisces. Despite being four times the diameter of Earth, its immense distance from the Sun (2,870 million kilometres) means that most visual observers consider discerning its tiny 3.7-arcsecond, magnitude +6, blue-green disc in backyard telescopes is achievement enough.
For decades, scientists have witnessed swirling clouds and violent winds in the atmospheres of ice giants Uranus and Neptune. Voyager data in the 1980s revealed that the pair actually has some of the strongest east-west jet streams in the solar system.