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The furthest two planets in the Solar System both have similar masses, sizes, and atmospheric compositions, but they are different shades of blue. Scientists can finally explain why Uranus and ...
Both planets are actually a similar shade of pale, greenish blue, new research suggests
As with Uranus, the source of this heating is unknown, but the discrepancy is larger: Uranus only radiates 1.1 times as much energy as it receives from the Sun; [130] whereas Neptune radiates about 2.61 times as much energy as it receives from the Sun. [131] Neptune is over 50% farther from the Sun than Uranus and receives only ~40% of Uranus's ...
Neptune, which is Uranus's near twin in size and composition, radiates 2.61 times as much energy into space as it receives from the Sun, [23] but Uranus radiates hardly any excess heat at all. The total power radiated by Uranus in the far infrared (i.e. heat) part of the spectrum is 1.06 ± 0.08 times the solar energy absorbed in its atmosphere .
Ice giants have distinctly different interior compositions from gas giants. The Solar System's ice giants, Uranus and Neptune, have a hydrogen-rich atmosphere that extends from the cloud tops down to about 80% (Uranus) or 85% (Neptune) of their radius. Below this, they are predominantly "icy", i.e. consisting mostly of water, methane, and ammonia.
A new study has revealed that the two ice giants are actually much closer in colour than typically thought. Images reveal what Neptune & Uranus really look like Skip to main content
Neptune is 17 times the mass of Earth, slightly more massive than its near-twin Uranus. Neptune is denser and physically smaller than Uranus because its greater mass causes more gravitational compression of its atmosphere. Neptune orbits the Sun once every 164.8 years at an average distance of 30.1 au (4.5
Astronomers have used telescope data to color-correct Voyager 2 images of Neptune and Uranus, revealing that the planets have a similar greenish blue hue.