Comet Hale-Bopp,
838x570x16.7m. 103kb.
Comet Hale-Bopp,
502x349x16.7m. 49.1kb.
An aurora from 1991. 
440x304x16.7m. 25kb
Techtron 15" Dobsonian Telescope
Primary mirror: 15"
Secondary mirror: 2.14"
2" rack and pinnion focuser
weight: 100 lb