Mysterious blue sand dunes on Mars

NASA has announced a strange and colorful sand dune structure that has been sent back to Earth by the Reconnaissance Orbiter.

Recently, NASA's Reconnaissance Orbiter (MRO) detected a strange blue triangular sand dune near the Lyot Crater.

NASA scientists say the dunes are smoother and seem to have a different structure from the surrounding.

At the same time, the dunes of the dunes are due to chemical reactions between the dunes in the sand dunes and some other chemical compounds in the crater layer , but what is specific is unclear.

Mysterious sand dunes on Mars have just been discovered - (Photo: NASA).

Often the dunes accumulate in the depths of the crater, and then lava is brought to the surface. Terrible strong winds on Mars may be responsible for the fancy shape of this sand dune.

The remaining pictures provided by the MRO in this round are also very interesting, many of which show that the snow and ice still has marks on the surface of Mars when winter has passed.

In some other photos, snow ice has melted but makes the Martian surface have strange shapes. Mars also has a snowy season like Earth, but only in these ice layers is made of CO2.

And when the "dry" ice on Mars is exposed to the sun, it will create unique lines on the arid surface of the planet.

Here are some photos sent by MRO:

The photo shows a huge flow of lava dried up on Mars - (Photo: NASA).

Scientists say Mars rising lava layers can cause the volcanic belt to separate them into 3, 4-storeys.The photo was taken in the northern belt, where there is a 30km wide crater - (Photo: NASA).

The green part in the picture shows a region of soil with a special soil structure, consisting of iron-rich minerals such as olivine and pyroxene.The yellow area shows that the yellow soil and rock layers are being changed - (Photo: NASA).

The 'dry' tapes remain after winter in the Northern Mars - (Photo: NASA).

A beautiful infrared photo shows cracks like worms of a mysterious crater on Mars - (Photo: NASA).

Close up of fissures 'worms' - (Photo: NASA).