All posts by jagrier

By jagrier on February 16, 2018 in

We saw in our last post in this series (Post 12) that impact events can change the target rocks in many ways. Some of these changes can be seen from orbit. But something as powerful as an impact event can also change the target rocks in dramatic ways that you can only see close-up. If […]

By jagrier on February 2, 2018 in

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 […]

By jagrier on January 26, 2018 in

As promised, here is our second mystery concerning craters and incidence angle. This is an image of a region of the Moon south of Copernicus crater. Take a good look. Something isn’t quite right … Can you see what is off? If yes, you’ve probably spent a lot of time looking at images here at […]

By jagrier on January 19, 2018 in

In this post we will be investigating a crater mapping mystery. For a little background (and a bit of a hint) let’s call back to another post in this series, when we were talking about how to tell a crater from a hill – here’s the image: In this image, we can see that we […]

By jagrier on January 15, 2018 in

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 […]