M 13 - The Great Globular Cluster in Hercules
This is M13, The Great Globular Cluster in Hercules:
After only 6 exposures in this session, the sky shut down. 30 exposures would have been better, and I thought that this would be another train wreck, but after all, I think, the result is quite pretty.
This is the brightest globular cluster that we have. It consists of about 300,000 stars and is about 25,000 lightyears away from us. Globular clusters swarm round Galaxies and orbit the galactic center, but they are normally not in the galactic disc like all other stars but above or below it. This one is quite close to us, but there are some that are actually so far away that they are almost halfway to our galactic neighbors.
It would have been better to take more pictures to get better colors, but you can already see the nicely contrasting blue and reddish stars that make this cluster.
|Exposure:||6 x 300s, ISO800 + Darks|
|Camera:||Canon EOS 1100D, modified + CLS CCD Clipfilter|
|Telescope:||10" GSO RC, 2000mm|
|Guiding:||OAG with Lodestar and PHD|
|EIP:||Fitswork and Gimp|