Enter a new world in the Maryland Science Center's planetarium! Sign up for a twenty minute time block to learn about the constellations. For grades K-6 This event will take place at the Potomac Elementary School gymnasium. All attendees must register! A limited amount of people are allowed in the plantarium at a time, so adults must register if they are attending with their children. We ask that no more than two adults enter with children to accommodate as many children as possible.