Hello, I recently got WWT and am interested in tracking movements. Obviously the known objects i.e. planets & sattelites are clockworked. For unknown objects, therefore, movement will depend on direct observation. So that leads to the question of when updated images get uploaded. Thanks to anyone with information. Lacking this, I would like to know the dates for the following (when the surveys were obtained , not uploaded) if possible: DSS Optical IRIS @MASS SDSS Sloan Optical ...and yes, maybe