The largest storm in the solar system is located on the planet Jupiter. This is known as the Great Red Spot. The winds blow at a speed of up to 432 km/h. Astronomers have seen this spot for a few hundred years, but the storm keeps changing and remerging. In 1979, NASA’s Voyager 1 spacecraft captured and transmitted the first clear image of the Great Red Spot from a distance of 9.2 million kilometers from the surface. The Juno spacecraft specifically sent to study Jupiter also studied the spot thoroughly. It made its closest approach to the surface on 11 July 2017, just 8000 km above the planet.
The Great Red Spot rotates in the anti-clockwise direction and takes about 6 Earth days to complete one revolution. The Great Red Spot measures more than 16,300 km. The latitude of the Great Red Spot doesn’t change much but it keeps oscillating in the longitudinal direction. The clouds from this region are found to be 8 km higher than the surrounding clouds. It is still not known accurately what is the reason for the red color of this spot? But it is thought that it is caused when the solar UV irradiates the ammonium hydrosulfide and acetylene producing a reddish material. The Great Red Spot is found to decrease in its size from recent measurements.
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