Annie’s class visited a planetarium, where they enjoyed a program called “Summer Constellations.” During the program the instructor used her pointer to show the students how to find constellations in the summer sky. At the end of the program Annie asked if the instructor would point out Orion. The instructor said, “I can’t do that because Orion isn’t visible in the summer sky. Give an explanation for why Orion is not visible in the summer sky