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Uranus is the seventh planet from the Sun. It is a gaseous cyan-coloured ice giant. Most of the planet is made of water, ammonia, and methane in a supercritical phase of matter, which in astronomy is called 'ice' or volatiles. The planet's atmosphere has a complex layered cloud structure and has the lowest minimum … See more
Like the classical planets, Uranus is visible to the naked eye, but it was never recognised as a planet by ancient observers because … See more
Uranus orbits the Sun once every 84 years. As viewed against the background of stars, since being discovered in 1781, the planet has … See more
Although there is no well-defined solid surface within Uranus's interior, the outermost part of Uranus's gaseous envelope that is accessible to remote sensing is called its See more
Before the arrival of Voyager 2, no measurements of the Uranian magnetosphere had been taken, so its nature remained a … See more
It is argued that the differences between the ice giants and the gas giants arise from their formation history. The Solar System is … See more
Uranus's mass is roughly 14.5 times that of Earth, making it the least massive of the giant planets. Its diameter is slightly larger than Neptune's at roughly four times that of Earth. A resulting … See more
Wikipedia text under CC-BY-SA license List of North American animals extinct in the Holocene
This list of North American animals extinct in the Holocene features animals known to have become extinct in the last 11,700 years on the North American continent. Animals recently extinct in the West Indies and Hawaii are in their own respective lists.
Many extinction dates are unknown due to a lack of relevant information.Wikipedia · Text under CC-BY-SA license
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