ASTRONOMICAL!
'(<a href="http://www.j-archive.com/media/2010-07-14_DJ_17.wmv">Kelly of the Clue Crew shows an astronomical animation on the monitor.</a>)  In January, the red star appears to be in front of a group of stars, while in July, it appears to be in front of a different group; the term for that apparent shift caused by change in the observer's position is this'
the parallax view