Neptune has the fastest winds in the solar system reaching speeds of 1,200 mph (2,000 kp/h) and going up to 1,500 mph (2,400 kp/h) in some areas of the planet, It was the discovered mathematically before it was seen John Couch Adams predicting its existence and location in the mid 1840s, which then lead to its telescopic discovery in 1846, but Galileo mistook it for a star earlier than Adams, Neptune has 17 times the Earth’s mass but it also has similar surface gravity since its spread over a huge volume, so you would sink in about the same amount of pull, It also can not be seen to the naked eye because it’s too dim to see without a telescope, a single year on Neptune is 165 Earth years so Last time it completed was about 2011, The reason it has its deep blue hue is due to its Methane in its upper atmosphere which absorbs red light, It has had only one single visitor voyager 2 is the only spacecraft that has ever flown past Neptune, it is an Ice giant with ammonia, methane, make fully of water over a rocky core and no solid surface to stand on. With a great spot similar to Jupiter with massive storms, including its great dark spot, it has 14 moons including triton that has a massive geyser, its tilt is similar to earths that create seasons (28 degrees) its temperatures are around -201 degrees celsius.