The Great Red Spot is a giant, spinning storm in Jupiter’s atmosphere. It is a football-shaped area of storms. It is like a storm on the Earth, but it is much larger. Jupiter’s Great Red Spot is twice the size of the Earth. The spot has a high pressure and storms with winds. It is about 28,000 kilometres long and 14,000 kilometres wide. It is the biggest storm in the solar system. The Great Red Spot was discovered in 1664 by Robert Hooke.