This animation shows the expansion of the Crab Nebula between the years of 1999 and 2012. The 1999 picture was taken by ESO using the VLT. The more recent picture was taken at the Mount Lemmon SkyCenter using the 0.8m Schulman Telescope. Visit http://Skycenter.arizona.edu . You can participate in one of our stargazing programs and look through the same telescope to see the Crab Nebula with your own eyes!