Astronomy Picture of the Day . ... If you'd like to try it, this weekend may be your chance as many astronomy clubs and organizations will be hosting public celebrations of Astronomy Day on Saturday, May 22nd. ... Cyclone on Mars . ... Late last month a team of Mars-watching astronomers sighted an immense cyclonic storm system raging near the Red Planet's north pole. ... Europe at Night . ... Landsat 7 Views Planet Earth . ... Launched last month, NASA's Landsat 7 spacecraft now orbits planet Earth. ...