Interesting L shape

Anyone know what this or what’s causing it? The shape can be seen in most surveys although not always appearing as an L.

Welcome :slight_smile: If you click on the map and follow the “single exposures” link, you’ll get
showing the different exposures that went into making the color image in this bit of the sky. Here, in the bottom exposure, you’ll see that this is part of a larger squiggle – a cosmic ray – and the bottom part of it was detected by the software and eliminated, but this L part was not, and so it shows up in the final result. Cosmic rays are pretty common – just north of your example there’s this one,
Cosmic rays are basically pesky particles that hit our CCD detectors and cause these squiggles.


Interesting, I’m very new to this but fascinated by all of it. Thanks!

1 Like