365 Days of the Moon -- August 25, 2014

Tycho and secondary crater streams

A while back we took a wide view of Tycho under high sun illumination and looked at the parallel "railroad track" rays that seem to extend tangentially from the crater's rim. In addition to hundreds of tiny secondary craters peppering the area, here we also see the beginnings of the railroad tracks as a dual compact stream of secondary craters extending to the upper right. I still have not heard a convincing explanation of how these offset ray streamers came into being. The Moon may be the closest celestial body and the only one humans have explored, but Luna still hides some of its secrets.

Image taken through a Celestron 11 Edge HD with a 2.5X Powermate and Skyris 274M camera.

Image copyright Robert Reeves 2014

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