The mysterious whirlwind sweeps the moon of Saturn

Scientists are scratching their heads with a cloud of 200-mile tall clouds that stir up the cloudy atmosphere of Titan's icy moon.

This mysterious "whirlwind" image was recorded by the observation ship Cassini at the southern tip of Titan. NASA hopes this discovery could help scientists see through the moon's mysterious atmosphere and find out what Titan's surface really is.

The cloud and dust column image was taken by Cassini at the southernmost tip of Saturn moon.

Every season in Titan lasts for 7 years, so the opportunity to cloud and have a clear view of this is extremely rare, NASA said. This cloud pillar is very similar to the whirlwinds that often appear on the sea at Earth. However, what causes the cloud column to remain is unknown.

'The image taken by Cassini shows a thick cloud of fog and fog forming a very high altitude. This may be a sign that Titan is moving into a new season , "surmises Nasa.

Earlier, Nasa's Cassini explorer ship discovered numerous sand dunes on Titan's surface. These dunes are very different in shape but many look very similar to the desert on Earth. Only they are 91 meters tall and up to a mile wide, formed by frozen hydrocarbons, a compound commonly found in crude oil rather than sand.

It is estimated that there are 4 million square miles of sand dunes on Titan's surface, which is equivalent to the size of the whole United States. Understanding the mechanism of forming sand dunes can be the key to the mysterious moon's weather chart.

Besides, the gravitational measurement also showed that Titan could have an underground ocean beneath the surface, with depths of up to several hundred kilometers.