Uranus Facts: Very Unique Rotation & Formation, Distance, Size, And Mass

Uranus Facts: Very Unique Rotation & Formation, Distance, Size, And Mass

Uranus is the seventh planet that was found in the Solar System. It also led to the discovery of the last planet, Neptune, so they are both called ice giants, which means they have a lot of ice in them. After many observations in the past, it was made official in 1781. It is the 3rd larger planet in the Solar System, and it is also the third dense planet.

Overview & Relevant Facts

  • It hasn’t been seen for a long period because of its dimness and slow orbit. However, in 1781, Sir William Herschel announced that it had been found. This built it the first planet to be found with a telescope.
  • It was named Uranus, after the Greek god of the sky, Ouranos, so it was called that.
  • Because its name comes from Greek mythology, it is the only planet with a name that comes from a person.
  • Uranus has a mean obvious magnitude of 5.68 and a standard deviation of 0.17, which makes it close to the point where you can see it with your own eyes without glasses.
  • Uranus is the 7th planetoid from the Sun. It is about 1.8 billion miles or 2.9 billion kilometers away from the Sun.
  • Third in size and fourth in weight, it is third place in the Solar System.
  • At its wider point, it has a radius of 25.362 kilometers, which is about 15.759 miles. It has about 14.5 times the mass of Earth and four times its diameter, which is about 31.763 miles.
  • It is 19.2 AU away from the Sun on average. It is 18.8 AU away from the Earth right now. It can be checked online because Uranus is always being kept track of.
  • Many Earths can fit inside it because it has about 63 times as much space as Earth does!
  • Uranus’ gravity is about 8.87 m/s2, or about 86% of the gravity on Earth’s surface, which is 9.807 m/s2.

leftover from the nebula

Even though Uranus can be seen with the naked eye, it took a long time for scientists to figure out what it was. Usually, people think it’s a star. It’s thought that Hipparchos might have put it in his star catalog in 128 BC. Later, it was added to Ptolemy’s Almagest.

However, the first known sighting was in 1690. John Flamsteed saw it six times and called it 34 Tauri. In the future, Charles Le Monnier saw it about 14 times between 1750 and 1769, but he didn’t write anything about it. When William Herschel looked at it with a telescope on March 13, 1781, he could figure out what it was.

Herschel wished to name the new planet Georgium Sidus, which means “Georgian Planet.” But he changed his mind. People outside of Britain didn’t like this decision, and they came up with other ideas, like calling Herschel by his name or even by the name of Neptune, who hadn’t been found yet. Neptune was a big hit because it would have celebrated the British Royal Navy’s victories in the American Revolutionary War. It was quickly dropped, though.

In 1782, Johann Bode came up with the name Uranus, Latinized form of the Greek god of the sky, Ouranos. He said that if the new planet didn’t follow mythology, it would be different from the rest of the world. So, like Jupiter was a child of Saturn, he should be named after the parent of that parent, Saturn. Martin Klaproth, a friend of Bode, named his new element uranium in support of Bode’s choice in 1789. During 1850, the name became more and more well-known.

“Sky King Star” is how other languages say Uranus in other languages. Uranus is also called the “sky king star.” Thailand calls it Dao Yurenat, which means “King of the Sky.” In Mongolia, it’s called Tengeriin Van, which translates to “King of the Sky.”


Through simulations that follow the Nice model, it has been thought that both Uranus and Neptune were born closer to the sun and then drifted away from the sun. It is thought that the Solar System came from a huge ball of gas and dust called the pre-solar nebula. Several parts of it made up the Sun. A lot more of it went on to make the first protoplanetary bodies.

As they grew, some of them had enough matter for their gravity to hold on to the excess gas from the nebula. 4.5B years ago, it was thought that the universe was made and drifted around for about 4 billion years before that.

Distance, Dimensions, and Mass

This is how the planet has changed since it was founded: It has moved 1° west every 72 years, but its average distance from the sun hasn’t changed. Except for Pluto, no other planet is farther from the sun than Earth is. Its distance from the sun is about 1.8 AU, which is bigger than any other place on Earth.

Though it has a mass of about 14.5 times that of Earth, it is the least massive of the other giant planets. It has a mass of 8.681 1025 kg. Even so, its diameter is just a little bigger than that of Neptune, and it’s about four times the size of Earth: about 51.118 kilometers or 31.763 miles in diameter.

This makes Uranus the second least dense planet, after Saturn. Uranus has a density of 1.27 g/cm3, making it the second least dense. This number shows that it is mostly made of ice like water, ammonia, and methane.

3rd in size: It has a radius of 25.362 kilometers or 15.759 miles. Its volume is about 63 times bigger than Earth’s, which means that 63 Earths can fit inside it, which is 3rd in size.

Circumference and Rotation

Uranus takes about 7 years to pass through each zodiac constellation to go around the sun. It takes Uranus 84 years to form it back to the sun. It had an interesting shape because the planet didn’t stay where it was supposed to be. This led to the discovery of the last planet in 1846, later called Neptune.

As with all the gas giants, Uranus rotates in about 17 hours and 14 minutes. This makes a full rotation happen about 14 hours faster than the other gas giants, which take about 17 hours.

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