Interestingly, Uranus is the coldest planet in the solar system. Uranus is the 7th planet from the Sun, moving in a radius of 2.88 billion km. But it is much closer than Neptune, which is 4.5 billion km from the Sun.
6 Interesting Facts About Uranus
- Unlike other major planets in the Solar System, Uranus actually emits less heat than it absorbs from the Sun. Other large planets have extremely hot cores and emit infrared radiation. But something caused the core of Uranus to cool down.
- All planets in the solar system rotate on an axis with a slight tilt. For example, the Earth's axis of rotation is tilted 23.5 degrees; But the tilt of Uranus is 99 degrees. In other words, if all the planets are a bit like a top when they revolve around the Sun, then Uranus is more like a rolling ball. And this leads to another strange fact about Uranus ... Summer on Uranus lasts one long day - 42 years. A day on Uranus is approximately 17 hours.
- Uranus is the second least dense planet after Saturn. This low density has an interesting side effect. Even though Uranus is 14.5 times more massive than Earth, gravity is comparable to that of Earth.
- Like all planets, Uranus has its own moons. Astronomers have counted 27 natural satellites.
- Uranus was the first planet discovered after the invention of the telescope. It was recorded in 1690 by John Flamstead, who at first thought it was a star.
- Only one spacecraft in the history of space travel has approached Uranus. NASA Challenger 2 visited Uranus in January 1986.