This is an image of Neptune and its famous Great Dark Spot
Click on image for full size
Neptune was discovered in 1846. But it wasn't discovered using a telescope. Scientists used math instead! They watched Uranus and saw that its orbit was doing weird things. They knew another planet had to be changing it. They were right!
Neptune's largest moon, Triton, was discovered at the same time as Neptune. Another moon called Nereid was found in 1949. Neptune's other six moons were found by Voyager II in 1989. Voyager II took many pictures of Neptune and its moons. Almost everything we know about this planet came from the Voyager II mission.
Neptune is usually the eighth planet out from the Sun. But sometimes Pluto actually crosses in front of it! Neptune was named after the ancient god of the seas.
Shop Windows to the Universe Science Store!
Learn about Earth and space science, and have fun while doing it! The games
section of our online store
includes a climate change card game
and the Traveling Nitrogen game
You might also be interested in:
How did life evolve on Earth? The answer to this question can help us understand our past and prepare for our future. Although evolution provides credible and reliable answers, polls show that many people turn away from science, seeking other explanations with which they are more comfortable....more
Triton was discovered by W. Lassell in 1846. Of the 8 moons, it is the 2nd farthest from Neptune. Triton may be one of the largest of the icy moons with a diameter that is about half the distance across...more
Neptune was the name that ancient Romans gave to the Greek god of the sea and earthquakes, Poseidon. Neptune was depicted as a bearded man with long hair, holding a trident and accompanied by dolphins...more
Neptune has // Call the moon count function defined in the document head print_moon_count('neptune'); moons. It also has rings, but its rings are different from Saturn's. Neptune's largest moon is named...more
The Giant planets do not have the same kind of layers inside that the Earth-like planets do. The history of the giant planets was so different that they formed with much more gas and ice on the inside....more
The South Pole of the planet Neptune is a bit strange. Triton, Neptune's largest moon, also has interesting poles. Neptune is tilted on its axis by about 28°. That isn't so strange... Earth is tilted,...more
The atmosphere of Neptune is a lot like that of Uranus, and unlike that of Saturn and Jupiter. On Jupiter and Saturn, the atmosphere is mostly made of the simple molecules hydrogen and helium. The atmosphere...more
There are four ideas for where the atmosphere comes from: 1. that the planet-elements which made the planets made the atmosphere too, 2. that the atmosphere was drawn to the planet from the cloud out of...more