Cold, dark and windswept - despite its calm appearance, the ice giant Uranus is a planet of extremes. Orbiting the Sun at an average distance of 2.9 billion kilometres - more than 19 times further out ...

Uranus and Neptune are there too, technically, but they don't appear as 'bright planets'," NASA's Preston Dyches explained in a stargazing video guide. Stock illustration of all the solar system's ...