Saturday, April 24th is the 20th anniversary of the launch of the Hubble Telescope by NASA. The launch date was exactly on April 24, 1990 at 8:33:51 am EDT. Google Australia already has a special logo up for the day. This logo, like the Olympics logo spans across the width of the web page. Something you may not notice is that some of the stars and planets can be clinked on. They actually hyperlink to Google Sky, so give it a try.
I assume this will continue to go live on the various Google destinations as the clock hits Saturday around the world.
Hat tip to Michel Wester.