Uranus and Neptune remain largely mysterious.
and Saturn are, as their name suggests, mostly gas, ice giants such as Uranus and Neptune are rich in heavier elements.and Neptune.
The proposal involves both an orbiter to gather data about Uranus over time and a probe dropped into Uranus' atmosphere to scan the planet from the inside. The aim of the mission — currently given the placeholder name of the — is to explore how Uranus and the rest of the solar system formed and to help solve mysteries regarding the planet, its moons and its rings. The mission is recommended to last for at least five years.
The sideways nature of Uranus causes the planet to experience extreme seasonal variations over its 84-Earth-year orbit unlike those of any of the solar system's other planets, and what little astronomers can see of the world from Earth cannot explain what they know of its weather patterns.
In addition, Uranus has nine very dense, narrow rings around it that suggest the existence of"shepherd moons" whose gravitational influence kept these rings from rapidly spreading out and losing their sharp edges. The UOP can help search for these extra shepherding moons, and also analyze the unexpectedly dark ring particles, whose composition is clearly different from that of the surfaces of Uranus' moons.
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