In this activity, students differentiate between natural satellites and artificial satellites, and are challenged to create a model of an artificial satellite, including calculating the amount of energy required to power the satellite and the size of the solar array required to generate that power. Student worksheets, answer sheet, illustrations of satellites, teacher tips and Web links are included. This is Lesson 2 in What are Satellites, part of IMAGERS, Interactive Media Adventures for Grade School Education using Remote Sensing. The website provides hands-on activities in the classroom supporting the science content in two interactive media books, The Adventures of Echo the Bat and Amelia the Pigeon.