The Mars Global Surveyor has taken a picture of
Earth from Mars. Even cooler, it got Jupiter into the same picture. You can check it out at the original site --http://www.msss.com/mars_images/moc/2003/05/22/ -- but that might be bogged down because it was posted to slashdot.org and lots of geeks are looking at it. The slashdot story can be found at
http://science.slashdot.org/science/...d=134&tid=160. The original picture has been posted on a mirror at
http://www.dpk.net/earth_jupiter_100.jpg where it's much easier to access.