In roman mythology, Neptune was the god of the sea. In 1613, Galileo first sighted Neptune. At first, he thought it was just a star, but soon realized that it was a planet. Neptune has been visited only once by a spacecraft, on Aug 25 1989.
Neptune is 24,622 km. The weight is 17.15 M⊕ and Neptune is 4.5 billion years old. Inside, it is made of hydrogen, helium, methane gas, water, ammonia, methane ices, rock and ice. It is blue with red-ish rings. The temperature is -353 Fahrenheit.
The envelope of gases surrounding the earth or another planet.
A unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the centro of the sun.
A region around a magnetic material or a moving electric charge within which the force of magnetism acts.
A celestial body orbiting the earth or another planet.
The gradual development of something
A natural electrical phenomenon characterized by the appearance of streamers of reddish or greenish light in the sky, especially near the northern or southern magnetic pole.
- Neptune is the 8th planet
- It takes Neptune 164.8 Earth years to orbit the Sun
- Neptune has the second largest gravity of any planet
- Neptune also has a second storm called the Small Dark Spot
- Neptune has 14 known moons