by Dave Mitsky
I captured this 25-second long shot of the globular cluster M4 in Scorpius remotely using the Bradford Robotic Telescope's 14" f/11 Celestron C14 SCT and FLI MicroLine camera located on Tenerife in the Canary Islands. A Celestron focal reducer yielding an effective focal length of 1877mm at f/5.3 was employed. North is up in this shot. For further information on M4, one of the closest of the globular clusters, see http://www.maa.clell.de/Messier/E/m004.html.