Markarian's Chain of Galaxies
The pinwheel galaxy on the upper left is M99 (aka: Virgo Cluster Pinwheel, Pinwheel Nebula, St Catherine's Wheel). Spiral Galaxy M98 on the lower right is more edge-on.
Image details: 11* 5 = 55 minutes total exposure, March 2009 from the Davis Mountains, TX, USA. Takahashi TOA 130 Telescope (a 5" APO refractor telescope with reducer), AP 900GTO mount, QHY8 CCD Camera. Other pictures from the camera are are here. Images processed using my Astronomy Image Processing Workflow.
March 2009 Davis Mountains Images
