Hi, ALL Thank you for the links. There is a  lot of info out there.  Thank you again Mark From: "stormcrow60@xmission.com" <stormcrow60@xmission.com> To: utah-astronomy@mailman.xmission.com Sent: Monday, December 1, 2014 4:42 PM Subject: [Utah-astronomy] Mark Shelton - Scales of the Universe Mark,     See the three links below. Perhaps one of these is what you were  mentioning. Good luck with your class. Jon http://joshworth.com/dev/pixelspace/pixelspace_solarsystem.html http://htwins.net/scale2/ http://www.eamesoffice.com/the-work/powers-of-ten/ _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".