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This extended corona is a unique feature of Uranus. [111] Its effects include a drag on small particles orbiting Uranus, causing a general depletion of dust in the Uranian rings. [99] The Uranian thermosphere, together with the upper part of the stratosphere, corresponds to the ionosphere of Uranus. [101]
Uranus is an oblate spheroid, which causes its visible area to become larger when viewed from the poles. This explains in part its brighter appearance at solstices. [16] Uranus is also known to exhibit strong zonal variations in albedo (see above). [10] For instance, the south polar region of Uranus is much brighter than the equatorial bands. [3]
The atmosphere of Uranus is composed primarily of hydrogen and helium. At depth, it is significantly enriched in volatiles (dubbed "ices") such as water , ammonia , and methane . The opposite is true for the upper atmosphere, which contains very few gases heavier than hydrogen and helium due to its low temperature.
Uranus is the butt of a lot of jokes, but scientists pronounce the name of our seventh planet differently than, say, most giggling middle-schoolers. ... Alone but certainly unique, Uranus rotates ...
What’s known about Uranus could be off the mark. An unusual cosmic occurrence during the Voyager 2 spacecraft’s 1986 flyby might have skewed how scientists characterized the ice giant, new ...
The first panel (left) of this artist's concept depicts how Uranus' protective magnetosphere behaved prior to Voyager 2's flyby. The second panel shows that unusual solar weather was happening at ...
The two innermost moons, Cordelia and Ophelia, are shepherds of Uranus's ε ring, whereas the small moon Mab is a source of Uranus's outermost μ ring. [12] There may be two additional small (2–7 km in radius) undiscovered shepherd moons located about 100 km exterior to Uranus's α and β rings .
An extrasolar planet with a mass higher than Earth's, but substantially below the mass of the Solar System's smaller gas giants Uranus and Neptune, which are 14.5 and 17.1 Earth masses respectively. Kepler-10b, Gliese 667 Cc: Sub-Earth: A classification of planets "substantially less massive" than Earth and Venus. Mercury & Kepler-37b