Image Gallery: odd ‘shavings’ in Spirit of St. Louis crater on Mars

Image Credit: NASA/JPL-Caltech
Odd “shavings” on rock after brushing (left side of image). Image Credit: NASA/JPL-Caltech

An interesting image from the Opportunity rover, sol 4023. There are a lot of little shavings-like bits on this brushed rock inside the Spirit of St. Louis crater. Are they just a peculiar result of the brushing of dust by the rover instrument or something else? Are they bits of the rock itself or other embedded material? Similar ones were seen once before, but they seem to be uncommon, even after most brushings.

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Image Gallery: Martian sunset and Lindbergh rock mound

Sunset in Gale crater, as seen by the M-34 and M-100 Mastcam cameras on Curiosity. Image Credit: NASA/JPL-Caltech/James Sorenson
Sunset in Gale crater, as seen by the M-34 and M-100 Mastcam cameras on Curiosity. The bluish sunsets are uniquely Martian, the opposite of sunsets on Earth. Image Credit: NASA/JPL-Caltech/James Sorenson

Two new beautiful composite images, from two different rovers and locations on Mars. The first is a sunset in Gale crater, taken by Curiosity. Martian sunsets look bluish due to the light scattering effects of reddish dust in the atmosphere. The other image, from Opportunity, is of the scenic Lindbergh rock mound in the Spirit of St. Louis crater, on the rim of the huge Endeavour crater. A natural monument!

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About that ‘mystery rock’ on Mars: no it’s not a plant, but…

Microscopic Imager (MI) closeup view of Pinnacle Island showing the whitish colouring around the edges and the darker appearing "jelly" interior. Credit: NASA / JPL-Caltech
Microscopic Imager (MI) closeup view of Pinnacle Island showing the whitish colouring around the edges and the darker appearing “jelly” interior. Credit: NASA / JPL-Caltech

There has been a lot of discussion the past few days about that lawsuit filed against NASA for supposedly covering up / failing to investigate evidence of life on Mars by the Opportunity rover. This all has to do of course with that “mystery rock” found by Opportunity, nicknamed Pinnacle Island, which somehow just appeared near the rover (most likely dislodged and kicked up by one of the wheels) a few weeks ago.

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What is this mystery rock that ‘appeared’ near the Opportunity rover on Mars?

The enigmatic Pinnacle Island rock. Credit: NASA/JPL-Caltech/Stuart Atkinson
The enigmatic Pinnacle Island rock. Credit: NASA/JPL-Caltech/Stuart Atkinson

There is another little Martian mystery that has people talking this week – the odd appearance a few days ago of a small rock a few feet away from the Opportunity rover, it was announced yesterday during the Opportunity: 10 Years on Mars event at NASA.

The rock, nicknamed Pinnacle Island, wasn’t in images taken on sol 3528, but was in images taken of the same spot later on sol 3540. How did it get there and where did it come from?

Comparison image showing the before and after photos of the mystery rock "Pinnacle Island." The after image is the same patch of ground as in the inset box in the before image. Credit: NASA/JPL-Caltech/Jason Major
Comparison image showing the before and after photos of the mystery rock “Pinnacle Island.” The after image is the same patch of ground as in the inset box in the before image. Click for larger view. Credit: NASA/JPL-Caltech/Jason Major

As principal investigator for the mission, Steve Squyres, explained, the rock is whitish in colour, about the size of a doughnut with a darker spot (“jelly”) in the middle area, which has a concave or hollowed-out appearance. The finding sparked questions and theories ranging from a nugget either left there by a nearby meteor impact or deposited somehow by the rover’s wheels. Squyres thinks the wheel idea is much more likely than the random chance of a meteor happening to hit that close to the rover’s location. Are there any other possibilities?

Microscopic Imager (MI) closeup view of Pinnacle Island showing the whitish colouring around the edges and the darker appearing "jelly" interior.
Microscopic Imager (MI) closeup view of Pinnacle Island showing the whitish colouring around the edges and the darker appearing “jelly” interior. Click for larger view. Credit: NASA/JPL-Caltech

Microscopic Imager (MI) photos have also been taken of the object and analysis so far of the darker “jelly” has shown it to be rich in sulfur, magnesium and manganese (with twice as much manganese as any other rock examined before by the rover). It is thought that the rock has been flipped over, exposing its underside.

A fascinating mystery that is sure to keep the mission scientists busy for a while.

Thanks also to Jason Major and Stuart Atkinson for use of their complementary images.

This article was first published on Examiner.com.

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