Today is NASA Remembrance Day to honor the losses from Apollo One and the Columbia and Challenger Disasters, and today is also the 30th anniversary of the Challenger explosion and I remember where I was and what I was doing all too well.
Two images taken during the apollo 17 misson are showing a white u-formation on the surface of the moon.
The two images are posted on the NASA Flickr account next to each other. There is a date , but not a time available from when the images were taken. But apparently, the u-formation changed...