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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...
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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6 hours ago · The Hubble Space Telescope has recently observed a notable reduction in Neptune's cloud cover, as reported by Yahoo News. The 11-year solar cycle, in which solar activity is influenced by the magnetic fields of the Sun, is connected to this shift in Neptune's atmosphere.
5 days ago · In 2002–03 five additional tiny moons, estimated to be about 15–30 km (9–18 miles) in radius, were discovered in Earth-based observations. These are irregular, having highly eccentric orbits that are inclined at large angles to the planet’s equator; three orbit in the retrograde direction.
2 days ago · An international team led by UNIGE, UNIBE and PlanetS has shown the existence of two distinct populations of sub-Neptunes, resolving a debate in the scientific community.
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.
5 days ago · Neptune - Rings, Moons, Atmosphere: Evidence that Neptune has one or more rings arose in the mid-1980s when stellar occultation studies from Earth occasionally showed a brief dip in the star’s brightness just before or after the planet passed in front of it.
