Here's an image I created during my PhD thesis of the galaxy cluster Abell 1703 using 3 archival HST images (from GO 10325) in the F850LP, F625W and F555W bands corresponding to RGB colours. I thought it might be good for an APOD as it shows some nice strong gravitational lensing and the high res version has some very detailed background galaxies and interesting objects such as red spiral galaxies.
cheers
John
high res tif is here http://www.astro.ljmu.ac.uk/~jps/A1703hires.tif
low res jpg version:
