MESSENGER reveals Mercury’s colors

Apr 23, 2012 by Jason Major, Universe Today
MESSENGER image of Mercury, acquired with its Wide Angle Camera on March 21, 2012.

The subtle yet surprisingly varied colors of Mercury are revealed in the latest images from NASA’s MESSENGER spacecraft, now in its extended mission and second year in orbit.

The image above, a composite of Wide Angle Camera acquired in 996, 748 and 433 nanometers for red, green and blue, shows a semi-lit limb of Mercury with the bright rayed crater Debussy visible at left. (The image has been rotated 180 degrees from the original, and color saturation was boosted by 25%.)

Named for the French composer Claude Debussy of “Claire de Lune” fame, the crater itself is approximately 50 miles (80 km) wide. It was first detected by ground-based radar telescopes in 1969 as a bright spot.

Now, 43 years later, we have a spacecraft in orbit sending back images like this. Amazing.

Sinusoidal equal area projection map of Mercury from MESSENGER's VIRS instrument.

The various colors seen across Mercury are due to different mineral compositions of the geologic regions. The exact compositions are not yet known, and the current puzzle that researchers are trying to solve with MESSENGER is to figure out what materials make up Mercury’s complex, multi-hued surface. That will also give a clue as to what’s inside the planet and how it evolved… as well as how it is currently evolving today.

The image below is from MESSENGER’s Visual and Infrared Spectrograph (VIRS) and shows a map of Mercury’s surface, with RGB colors corresponding to different mineralogical compositions.

Younger surface materials that are brighter at visible wavelengths and less affected by space weathering show up in reds, yellows and greens. Materials that may have relatively higher iron contents show up in blue.

These are ’s “other ”… maybe not what we would see with our own eyes, but beautiful nonetheless to planetary scientists!

See the above image on the website here.

Explore further: Harvard astronomer Loeb caught up in the thrill of the search

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katesisco
1 / 5 (1) Apr 23, 2012
Whatever the makeup is it occurred with alternating pressure and release. This is the way the samuri swords and the famous Toledo steel were created: heating and pressure (hammering)