Author Archive | jagrier

“High-reflectance ejecta and low-reflectance impact melt streamers surround this fresh impact crater. NAC M189994606LR, image width 2.25 km” From  Image Credit:   [NASA/GSFC/Arizona State University].

CQ Science – Post 12: How Impacts Change the Rocks – Remote Sensing

As we’ve discussed in this series of posts, impact cratering events are highly energetic. They do much more than explode a huge hole in the ground – such events change the nature of the rocks themselves. Target rocks can be broken to pieces, shattered into dust, shocked with high pressures, completely melted, or even turned […]

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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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