were: selected from the Canadian International Year of Astronomy Image Database at http://www.galaxydynamics.org/iya2009/
(Restrictions for the use of the individual images may apply, see the corresponding License listings at the above website)
The Great Collision Simulation: John Dubinski (University of Toronto)
The Whirlpool Galaxy: Remi Lacasse (astromirabilis)
Collage of the Supernova Remnant Cassiopeia A and the VLA: Michael Bietenholz (York University and Hartebeesthoek Radio Observatory)
The Cygnus Region of the Milky Way in Invisible Light: Jayanne English (University of Manitoba) with support by A R Taylor (University of Calgary) for the Canadian Galactic Plane Survey
The Crab Nebula: Jayanne English (University of Manitoba) and the Hubble Heritage Team, NASA
Nebula van den Bergh 152: Paul Mortfield (Industrial Stars) and Stefano Cancelli
Jupiter and Io: Andre Montambault
Star and Planet Candidate: David Lafreniere, Ray Jayawardhana, Marten H. van Kerkwijk (University of Toronto and Gemini Observatory)
Comet Holmes: Pierre Tremblay (Quebec City)
The Pleiades: Remi Lacasse (astromirabilis)
Rick Stankiewicz (Peterborough, Ontario)
The Cosmic Web: John Dubinski (University of Toronto)