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On the other side of Uranus's orbit, the orientation of the poles towards the Sun is reversed. Each pole gets around 42 years of continuous sunlight, followed by 42 years of darkness. [74] Near the time of the equinoxes, the Sun faces the equator of Uranus, giving a period of day–night cycles similar to those seen on most of the other planets.
Uranus is the third-largest and fourth most massive planet in the Solar System. It orbits the Sun at a distance of about 2.8 billion kilometers (1.7 billion miles) and completes one orbit every 84 years. The length of a day on Uranus as measured by Voyager 2 is 17 hours and 14 minutes. Uranus is distinguished by the fact that it is tipped on ...
For instance, a small body in circular orbit 10.5 cm above the surface of a sphere of tungsten half a metre in radius would travel at slightly more than 1 mm/s, completing an orbit every hour. If the same sphere were made of lead the small body would need to orbit just 6.7 mm above the surface for sustaining the same orbital period.
The orbits of the regular moons are nearly coplanar with Uranus's equator, which is tilted 97.77° to its orbit. Uranus's irregular moons have elliptical and strongly inclined (mostly retrograde) orbits at large distances from the planet. [3] William Herschel discovered the first two moons, Titania and Oberon, in 1787.
The orbit of every planet is an ellipse with the sun at one of the two foci. ... Uranus 19.1913 30687.153 7.506 Neptune 30.0690 60190.03 7.504 Planetary acceleration
As of 2024, Uranus has 28 confirmed satellites, divided into three groups: Inner satellites, which orbit inside Uranus' ring system. [185] They are very close to each other, which suggests that their orbits are chaotic. [186] Large satellites, consisting of Titania, Oberon, Umbriel, Ariel, and Miranda. [187]
Grab a pair of binoculars and your lamest jokes because Uranus will be visible to the naked eye on Thursday night.
Umbriel orbits Uranus at the distance of about 266,000 km (165,000 mi), being the third farthest from the planet among its five major moons. [e] Umbriel's orbit has a small eccentricity and is inclined very little relative to the equator of Uranus. [2]