The Sideways Ice Giant
Meet Uranus, the planet that rolls around the Sun on its side. The first world discovered by telescope, this pale cyan ice giant endures 42-year polar seasons, the coldest atmosphere of any planet, and a family of moons named after literary characters.
Uranus is tilted 97.8°, essentially orbiting on its side, likely after an ancient collision with an Earth-sized body.
Despite not being the farthest planet, Uranus has the coldest planetary atmosphere, dipping to -224°C.
William Herschel discovered Uranus in 1781, doubling the known size of the solar system overnight.
Uranus is made largely of icy materials, water, methane, and ammonia, surrounding a small rocky core.
Methane in the upper atmosphere absorbs red light, giving Uranus its serene pale cyan color.
Uranus's 28 moons are named after characters from Shakespeare and Alexander Pope, including Titania, Oberon, and Miranda.
Uranus is the only planet named from Greek rather than Roman mythology: Ouranos, the primordial sky father and grandfather of Zeus.
Symbolism. The heavens, origins, vastness
Discovered in 1781, Uranus belongs to the modern age. Herschel initially named it after King George III before tradition prevailed.
Symbolism. Discovery, science, revolution
Because it was found during the American and French revolutions, astrologers associate Uranus with upheaval and sudden change.
Symbolism. Revolution, awakening, disruption
Its moons honor Shakespeare and Pope rather than mythology, a unique tribute to human imagination.
Symbolism. Imagination, art, originality
Uranus reaches opposition yearly and is best seen on dark, moonless autumn and winter nights.
At magnitude 5.7, Uranus is technically visible to the naked eye under pristine dark skies, but binoculars make it easy and a telescope shows a tiny cyan disk.
Use a star chart or astronomy app to distinguish Uranus from background stars; its steady, non-twinkling cyan glow gives it away.
Uranus moves slowly, spending about 7 years in each zodiac constellation, so it stays in the same sky region for years.
In astrology, Uranus is the great awakener, the planet of revolution, innovation, and sudden change. It rules technology, individuality, and the lightning-bolt insights that break old patterns.
Technology, invention, and flashes of genius
Breaking limits and honoring individuality
The unexpected events that liberate and awaken
Uranus is tilted 97.8 degrees, likely the result of one or more collisions with Earth-sized protoplanets early in solar system history. As a result, its poles take turns pointing at the Sun, creating 42-year-long polar summers and winters.
Methane gas in Uranus's upper atmosphere absorbs red wavelengths of sunlight and reflects blue and green light back to space, giving the planet its distinctive pale cyan color.
Only one. Voyager 2 flew past Uranus in January 1986, capturing our only close-up images. A dedicated Uranus orbiter is now NASA's top-priority flagship mission concept for the coming decades.
Just barely. At magnitude 5.7, Uranus sits at the edge of naked-eye visibility under very dark skies. Binoculars show it easily as a faint star, and a telescope reveals a small blue-green disk.