The Tharsis Region of Mars is Peppered With These Strange Pit Craters. Now They’ve Been Found Elsewhere

An Atypical Pit Crater in ancient terrain near Elysium Mons, as seen by the Mars Reconnaissance Orbiter. Credit: NASA/JPL-Caltech/UArizona.

Pit craters are found on solid bodies throughout our Solar System, including Earth, Venus, the Moon, and Mars. These craters – which are not formed by impacts — can be indications of underground lava tubes, which are created when the top of a stream of molten rock solidifies and the lava inside drains away, leaving a hollow tube of rock. If a portion of the roof of the tube is unsupported, parts of it may fall in, making a hole or a pit along the lava tube’s path.

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This Bizarre Terrain on Mars is Caused by Water Ice and Carbon Dioxide

Spring fans and polygons on Mars, as seen by the HiRISE camera on the Mars Reconnaissance Orbiter. Credit: NASA/JPL-Caltech/UArizona.

From orbit, this landscape on Mars looks like a lacy honeycomb or a spider web. But the unusual polygon-shaped features aren’t created by Martian bees or spiders; they are actually formed from a ongoing process of seasonal change from created from water ice and carbon dioxide.

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This Crater on Mars is Just a Couple of Years Old

A recently formed impact crater on Mars. Credit: NASA/JPL-Caltech/UArizona

Changes are always taking place on Mars, from factors like seasonal variations and wind. But there’s one other aspect that changes the surface of Mar quite often: impacts.

Here’s a new impact crater that was seen by the Mars Reconnaissance Orbiter. Exactly when the crater formed is not known, but this image was taken on July 24, 2020 and in a previous image of this site taken in 2018, the crater is not there.

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Perseverance Finally Spots its Own Parachute on the Surface of Mars

The parachute of the Perseverance rover lies on the Martian regolith in the distance. Sol 404 - MastCam-Z image. Credit: NASA/JPL-Caltech/ASU/Kevin M. Gilk

More than 13 months after the Perseverance rover landed on Mars (on February 18, 2021), the rover’s cameras have finally spotted some of the parts of the Mars 2020 landing system that got the rover safely to the ground.  The parachute and backshell were imaged by Perseverance’s MastCam-Z, seen off in the distance, just south of the rover’s current location. The image was taken on Sol 404, or April 6, 2022 on Earth.

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Mars Orbiter Captures Images of China’s Rover From Space

The Chinese Zhurong rover landed on Mars in May 2021.This HiRISE image, acquired on 11 March 2022, shows the rover's new location. Credit: NASA/JPL/UofA

China’s Tianwen-1 lander and Zhurong rover touched down on the Martian plain Utopia Planitia on May 14, 2021 after spending about three months orbiting the Red Planet. While the Chinese Space Agency has shared images of the rover and lander (including a cute family portrait taken by a wireless remote camera), NASA’s Mars Reconnaissance Orbiter has been following the rover’s travels from above.

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Strange Terraces on Mars are a Clear Signal of Sedimentary Rock

Sedimentary rock in Danielson Crater on Mars. Credit: NASA/JPL/UArizona

If we’ve learned anything about Mars the past 2-3 decades from the various rovers, landers and orbiters we’ve sent to the Red Planet, it’s that the planet’s geologic history is much more complicated and diverse than what we thought.

This picture from the HiRISE (High Resolution Imaging Science Experiment) camera on the Mars Reconnaissance Orbiter shows fractured sedimentary rock inside a crater called Danielson. Sedimentary rock is a sure sign that this planet was active in the past. The fracturing, layering and terrace-like structures suggests a long-term watery history in this region.

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‘Glowing’ Sand Dune Erosion on the Side of a Martian Crater

Erosion in Kaiser Crater on Mars, as seen by the HiRISE camera on the Mars Reconnaissance Orbiter. Credit: NASA/JPL/UArizona.

While Mars is known as the Red Planet, a variety of colors can be found on the planet’s surface. Just like on Earth, the array of colors we can see in images from Mars comes from the diverse minerals on or just under the surface.

In the case of this picture, subsurface minerals show up in gullies that have eroded down the side of a a giant sand dune.   

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Here’s Perseverance, Seen From Space

The white speck in the middle of this image is the Perseverance rover, as seen by the HiRISE camera on the Mars Reconnaissance Orbiter. Credit: NASA/JPL-Caltech/University of Arizona

The Mars Perseverance rover is on the move! The HiRISE camera on the Mars Reconnaissance Orbiter spotted the rover from above, the first view since shortly after the rover landed in February 2021. Perseverance appears as the white speck in the center of the image above, in the the “South Séítah” area of Mars’ Jezero Crater.

The HiRISE team said the rover is about 700 meters (2,300 feet) from its original landing site.

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