What are the crosses in "21st Century Atlas" for?
Posted 13 February 2014 - 11:54 PM
For example: On plate 2 ("Crisium 2"), there are crosses on the plate at Cannon, Condon, Watts, Tebbutt and Shapley crater (not to mention Schubert, Banachiewicz, Nobili and Jenkins). These are separate from the crosses marking the landing sites of Luna 20 and 24. There are a lot of other plates marked this way, too.
I can't figure out what's special about these craters, and I can't find anything in the book explaining what it's for. Can anyone tell me what I'm missing?
Posted 14 February 2014 - 12:50 AM
If the photos in question were not from the Apollo missions, I have no idea. I'm glad you like the book. Did you get it from Amazon a couple of days ago? I was about to select the last copy, but when I got to the check out cart it was already gone.
Posted 14 February 2014 - 09:50 AM
Could those photos been taken by the Apollo astronauts? Their photos had cross hairs so they could measure features in the images or know more about how the image was taken.
I know the crosses you mean, and no, that's not it. If you look at the sample images on the LPOD wiki, you can see what I mean if you squint:
- On chart 9, right-hand side, there are crosses on Hooke and Carrington.
- On chart L2 (East Limb), there are crosses on Peek, Tacchini, Respighi, Liouville, Nobili, Jenkins and Behaim.
I'm glad you like the book. Did you get it from Amazon a couple of days ago? I was about to select the last copy, but when I got to the check out cart it was already gone.
Yes I did, and that might well have been me. Sorry.
Posted 14 February 2014 - 02:10 PM
Posted 19 February 2014 - 04:52 PM