Equipment:
Hutech Modified Canon 40D
HorusBennu Tripod C-3540V, LX-5 Ball Head
Tokina 28mm f/2.8 lens @ f2.8
99 x 30 second exposures @ ISO 1600
Processed in Startrails & Photoshop

Comments:
Produced this star trails shot while searching for comet Lemmon (marked with red arrow) low on the horizon. Clouds move across the frame over the 50 minutes of 30 second exposures resulting in what looks like sun rays after stacking all frames.