The Student Astronaut Challenge is an aerospace-related secondary (grades 6-12) STEM competition. Student teams of six initially participate in a qualifying test where their scores are averaged for ranking. Students can test to participate in either the Apollo Division (Advanced level) or the Mercury Division (Beginner to Intermediate level). The top teams are then selected for each division. These teams compete in a four part final competition that is held over three days. The four challenges are design, engineering, landing, and space flight simulation.