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Learn about Neptune, the eighth and most distant planet from the Sun, with facts, images, and stories. Find out how Neptune was discovered, what it's made of, how many moons it has, and more.
- Neptune: Facts
Dark, cold and whipped by supersonic winds, ice giant...
- Neptune
Quick History. Neptune was discovered in 1846 by Urbain Le...
- Neptune: Facts
May 3, 2024 · Neptune, third most massive planet of the solar system and the eighth and outermost planet from the Sun. Because of its great distance from Earth, it cannot be seen with the unaided eye. With a small telescope, it appears as a tiny, faint blue-green disk. It is designated by the symbol ♆.
- When was Neptune discovered?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...
- How many moons does Neptune have?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...
- What gases are present in Neptune's atmosphere?Neptune’s outer atmosphere is composed predominantly of hydrogen and helium, contributing to 98 percent of the atmospheric molecules. Most of the r...
- Can Neptune be seen without a telescope?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...
- What is the color of Neptune?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...
Learn about Neptune, the eighth and most distant planet in our solar system. Find out about its size, orbit, moons, rings, atmosphere, and more.
NEPTUNE is the world's first regional-scale underwater ocean observatory that plugs directly into the Internet. [1] . NEPTUNE is the largest installation on the Ocean Networks Canada network of ocean observatories.
- 5.43 km/s
- 0.6713 day, 16 h 6 min 36 s
- 2.68 km/s (9,650 km/h)
Learn about Neptune, the outermost planet in our solar system, from its atmosphere to its moons to its rings. Find out how Voyager 2 visited Neptune, what we discovered, and what we still need to know.
