Join Detective Skye Watcher as she unravels the mystery of what happened to the planet Pluto. The number of planets has been going up and down for hundreds of years. What exactly makes an object a planet and why has that definition changed over the years? This “planetary caper” is for the young and the young at heart.

The program runs Sundays at 2 p.m. and Mondays at 7 p.m. January 30-March 28. General admission $3; children 12 and under, Seniors, 65 and above, and Tri-College students $1.50.

The planetarium is located at 11th Street and 8th Avenue South on the MSUM campus in Bridges Hall #167 in Moorhead.