太阳系：天王星
Uranus is the 7th planet in the Solar System. An ice giant, its existence was not known until it is discovered by William Herschel through his telescope in 1781. As of 2022, there are a total of 27 mo …
Uranus is the 7th planet in the Solar System. An ice giant, its existence was not known until it is discovered by William Herschel through his telescope in 1781. As of 2022, there are a total of 27 mo …
