NASA's Mars rover Perseverance photographs a ``dust devil'' that reaches a height of 2 km on Mars


Dust devil ' is a type of gust of wind that occurs when the atmosphere near the surface of the earth rises in a spiral shape due to updrafts, and is known to occur not only on Earth but also on planets such as Mars. NASA's Mars rover Perseverance has successfully photographed a 2km-high dust devil on Mars.

NASA's Perseverance Captures Dust-Filled Martian Whirlwind

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On August 30, 2023, Perseverance photographed a dust devil moving along the western rim of Jezero Crater on Mars. You can see a dust devil on Mars moving in the video below, released by NASA's Jet Propulsion Laboratory .

Perseverance rover captures Martian dust devil traveling at 12 mph! - YouTube

At the top of the video of the vast Martian wilderness, you can see a white object moving from the left to the right of the screen. This is a dust devil that occurred on Mars. This video is a combination of images taken by the navigation cam installed in Perseverance at 4-second intervals and turned into a video at 20x speed.

When you zoom in, it looks like this. If you look closely, you can see that it is swirling like a tornado and changing shape little by little.

The dust devil was said to be moving from east to west at a speed of about 19 km per hour at a point about 4 km away from Perseverance. The width that can be seen in the video is about 61m and the height is about 118m, but it actually extends upwards to the part that is not visible in the video, so it is thought to be much taller.

Mark Lemon, a planetary scientist at the Space Science Institute in Boulder, Colorado, and a member of the Perseverance science team, said, ``You can't see the top of the dust devil, but it's The shadow it casts indicates its height,'' he said, indicating that the height estimated from the shadow is about 2 km.

Dust devils are formed when warm updrafts collide with descending cold air, and are commonly seen in dry, dusty places on Earth such as Arizona, USA. Generally, dust devils that occur on Mars are said to be smaller and weaker than those on Earth, but the dust devil discovered this time was unusually larger than those on Earth.

in Science,   Video, Posted by log1h_ik