Archive | Moon Mappers

Side by side images:  LROC image examples of high versus low incidence angle.  Images are of nearby (not identical) regions of the Moon.  Images are from NASA/LROC, and appear in Grier et al., submitted LPSC 2018.

CQ Science – Post 9: Angle of Illumination, Mapping Craters, and How YOUR Work Leads to Science!

In the last post in this series, we talked about “incidence angle” and hearkened back to a couple of CosmoQuest posts on the topic including the Moon Mappers tutorial section on lighting effects , and a post about “Illumination and Optical Illusions.”  In this post, we are going to take a specific look at why […]

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In this plot we see the transition diameter of four worlds plotted against the gravity at the surface of each of those worlds (The Moon, Mercury, Earth, and Mars.).  (From LPI/USRA, at,  They site -  Credit: Illustration from an educational poster, Geological Effects of Impact Cratering, David A. Kring, NASA Univ. of Arizona Space Imagery Center, 2006.)

CQ Science – Post 6: Simple to Complex

In previous posts we’ve discussed how the very smallest craters have “simple” shapes, and that the somewhat larger craters have “complex” shapes. You may have been wondering why that is, and what we mean by “larger” anyway? How large is large? Well, that turns out to be dependent on the planet where the crater is […]

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Venus Corona.  It isn’t a multi-ring impact basin, but a result of magma (lava moving underground).  These are common features on Venus, and help us to understand that it was volcanically a very active place.

CQ Science – Post 5: Crater Confusion

Here at CosmoQuest we spend a lot of time looking at craters. It is a job that only people can do – not computers (yet, anyway). Scientists have been trying to write programs that will effectively identify and count craters, but they have met with only limited success. As noted, craters are not always perfectly […]

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