Knowra Neptune Neptune Neptune is the eighth planet from the Sun and an ice giant with a hydrogen-, helium-, and methane-rich atmosphere. Its fast winds, changing storms, and faint rings distinguish it among the outer planets.
Neptune's atmosphere : Neptune’s atmosphere is a deep envelope dominated by hydrogen and helium, with methane and other trace gases. Methane absorbs red light, while atmospheric circulation drives Neptune’s vivid clouds and storms.
Ice giant : An ice giant is a large planet whose interior contains substantial water, ammonia, and methane compounds. Neptune belongs to this planetary class, distinct from gas giants such as Jupiter.
Urbain Le Verrier : Urbain Le Verrier was a French mathematician who predicted Neptune’s position from irregularities in Uranus’s orbit. His calculations prompted the 1846 search that led to Neptune’s discovery.
Triton : Triton is Neptune’s largest moon, moving in a retrograde orbit and showing signs of geological activity. Its unusual orbit suggests Neptune captured it rather than forming with the planet.
Jupiter : Jupiter is the fifth planet from the Sun and the Solar System’s largest planet, classified as a gas giant. Unlike Neptune, Jupiter is dominated by hydrogen and helium rather than a larger proportion of planetary ices.
Neptune's Great Dark Spot : Neptune’s Great Dark Spot was a large atmospheric vortex observed by Voyager 2 in 1989. The storm showed that Neptune’s atmosphere can form and erase enormous vortices.
Solar System : The Solar System is the Sun and the objects gravitationally bound to it. Neptune is its most distant recognized planet.
Johann Gottfried Galle : Johann Gottfried Galle was a German astronomer who observed Neptune in 1846 using Le Verrier’s predicted position. Galle’s observation confirmed Neptune near the location Le Verrier had calculated.
Naiad : Naiad is a small inner moon of Neptune discovered in Voyager 2 images. Its orbit is one of several compact paths among Neptune’s inner moons.
Saturn : Saturn is the sixth planet from the Sun, a gas giant known for its extensive ring system. Its bright, broad rings contrast with Neptune’s faint, narrow rings.
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