This collection of activities is based on a weekly series of space science problems intended for students looking for additional challenges in the mathematics and physical science curriculum in grades 6-12. The problems deal with modern science and engineering issues, often involving actual research data. The section titles in this 75-problem collection include: What Is Life?; What Makes a World Habitable?; The Search for Earth-like Planets; Exoplanets and Their Properties; Basic Astronomy; The Drake Equation; Searching for Extra Terrestrials.