5 ms·
The bright spots are cool and all, but what's the deal with the lines across the surface? They remind me a bit of the lines you see from rocks moving across dry
by andrewstuart2 11y ago
The bright spots are cool and all, but what's the deal with the lines across the surface? They remind me a bit of the lines you see from rocks moving across dry lakebeds. (http://geology.com/articles/racetrack-playa-sliding-rocks.shtml http://geology.com/articles/racetrack-playa-sliding-rocks.sh...)
- _rpd 11y agoMay be the underlying ice melting and refreezing like on Europa ... http://i.space.com/images/i/000/029/810/i02/europa-thick-ice-crust.jpg http://i.space.com/images/i/000/029/810/i02/europa-thick-ice... ... due to occasional asteroid strike?
- Florin_Andrei 11y agoIf the lines end up converging towards a crater, then they are caused by ejecta from a meteorite impact. The Moon is full of such lines - I've taken this picture a while ago, and the ejecta lines are clearly visible after some post-processing: http://i.imgur.com/o81hb.jpg http://i.imgur.com/o81hb.jpg
- nekopa 11y agoGreat pic. Would you mind telling me the setup you used o take it? I currently have a DSLR with only a 300mm lense and have yet to get a photo of the moon that nice...
- Florin_Andrei 11y agoHome-made newtonian telescope. 150mm aperture, 1200mm focal length (f/8). Panasonic G1 camera (DSLR-like but without mirrors). Camera lens removed, camera body mounted on telescope focuser, so the sensor was in the focal plane of the telescope primary mirror. A.k.a. "prime focus" photography. Basically, the scope became the "camera lens". Some post processing in Lightroom, mostly just cranking up contrast and saturation. Some denoising. No idea what the exposure was, I just gauged it on the camera LCD so that I wouldn't get the over-exposure warning on the Moon surface.