the great dark spot disappeared in 1989
No, it is a storm, similar to the Great Red Spot on Jupiter.
A little ove 750 mph that is
to see the storm hapening
It is a giant dust storm like the one that Jupiter has. But Jupiters is a bit bigger. :)
The Neptunes was created in 1990.
Neptune's main feature is the Great Dark Spot, a giant storm with winds of over 1000 mph, making it the fastest storm in the Solar System. Neptune also has the Second Dark Spot, a smaller storm with slower wind speeds.
neptunes gravity is high
Just look around your farm.
neptunes size is 12% grater then the earth
Neptune has a massive anti-cyclonic storm system spanning 13,000 x 6,600 km It is called "The Great Dark Spot". There is also a smaller cyclonic storm in the southern region, called, not surprisingly, "The Small Dark Spot"
no
hydrogen and helium