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3 days ago · Neptune, third most massive planet in the solar system and the eighth and outermost planet from the Sun. Neptune has 14 moons, only two of which were discovered before Voyager 2’s visit in 1989, and a system of rings, which were unconfirmed before Voyager.
- Neptune was discovered on September 23, 1846. It is the second planet to be found using a telescope. Although Johann Gottfried Galle and Heinrich L...
- Neptune has 14 moons (natural satellites). Before Voyager 2's flyby of the planet, Neptune's only known moons were Triton and Nereid. Neptune's moo...
- Neptune’s outer atmosphere is composed predominantly of hydrogen and helium, contributing to 98 percent of the atmospheric molecules. Most of the r...
- Neptune is the only giant planet that is not visible without a telescope. It has an apparent magnitude of 7.8 and is approximately one-fifth as bri...
- Neptune’s color is a very vivid, bright blue, presumably an effect of the presence of methane and an unidentified atmospheric gas. With a small tel...
Jun 13, 2024 · Learn about Neptune, the last and darkest planet in our solar system. Find out how it's similar to Uranus, how long it takes to orbit the sun, and what its rings and moons look like.
3 days ago · Neptune is the only giant planet that is not visible without a telescope. Having an apparent magnitude of 7.8, it is approximately one-fifth as bright as the faintest stars visible to the unaided eye. Hence, it is fairly certain that there were no observations of Neptune prior to the use of telescopes.
3 days ago · The atmosphere. Like the other giant planets, Neptune’s outer atmosphere is composed predominantly of hydrogen and helium. Near the one-bar pressure level in the atmosphere, these two gases contribute nearly 98 percent of the atmospheric molecules. Most of the remaining molecules consist of methane gas.
3 days ago · Neptune is an ice giant planet, primarily composed of water, methane, and ammonia, and has a deep, turbulent atmosphere with strong winds and large storms, including the famous Great Dark Spot and the smaller Dark Spot. The planet has a day length of approximately 16.1 Earth hours and an orbital period of 165 Earth years.
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1 day ago · High precision real time tracking tool for Neptune which can be used identify Neptune and follow its movements across deep sky stellar fields.
Jun 13, 2024 · Learn about Neptune, the eighth planet from the Sun, with fun activities and games. Find out how Neptune compares to other planets, what it is made of, and how it was explored by Voyager 1 and 2.
