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Neptune (Planet)
built 190 days ago
Neptune emits about 2.7 times the amount of heat it absorbs from the Sun. Astronomers believe the excess heat that Neptune radiates comes from comet-like material that crashed into Neptune as the planet formed. Due to the force of gravity in the planet’s interior, the material in Neptune’s core is continually being pulled inward. As the material compacts, the molecules strike each other more frequently and with more force, releasing energy in the form of heat. Neptune’s core, which reaches temperatures of 5149°C (9300°F), is hotter than the Sun’s surface.
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The first possible sightings of Neptune is thought to be by Galileo as his drawings showed Neptune near Jupiter.[4] But Galileo wasn't credited for the discovery since he thought Neptune was a "fixed star" instead of a planet. Because of Neptune's slow movement across the sky, Galileo's small telescope wasn't strong enough to detect Neptune as a planet.[5]
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Neptune's powers are based on water and the Ocean. She has extrasensory powers, relying on the restless waves to clue her in to the presences of evil. Her talisman, the Aqua Mirror... inhances her natural sense of perception.
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The three features visible here are among the most interesting on Neptune. At the top is the Great Dark Spot, accompanied by bright, white clouds that change rapidly with time. Below the dark spot is a bright feature that scientists nicknamed "Scooter." Below Scooter is the Small Dark Spot. All three features move eastward at different velocities, so it is rare that they can all be photographed together.
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Neptune, like Earth, is surrounded by a magnetic field, a region of space that exerts a small force on electrically charged or magnetic material. Scientists believe that the slow escape of heat from the planet’s core circulates currents of electrically charged particles in Neptune’s deep ocean, generating a magnetic field. Neptune’s magnetic axis, the line indicating the direction of the force the planet’s magnetic field exerts, is aligned at an angle of 47° to Neptune’s axis of rotation. The influence of Neptune’s magnetic field extends for several hundred thousand kilometers above the planet.
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Through a small telescope, Neptune appears as a tiny greenish disk. Its linear equatorial diameter of 30,775 mi (49,528 km) is very similar to that of Uranus. The mass of Neptune is 17.20 times the mass of Earth, corresponding to a mean density of 1.62, somewhat above that of its sister planet. This suggests that the enrichment of heavy elements is somewhat greater in Neptune than in Uranus. See ... Uranus.
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Neptune (Planet)