The Cyber-Center is a simulated research center at the National Air and Space Museum where students can explore these and many other mysteries of the Solar System. Students are able to experience how scientists study planets that are millions of miles away. Excellent graphics offer reinforcement in visualization and classification techniques.
Additional links offer more information and extensions of the lesson.
This site will let you discover basic information about light in the Universe and how astronomers make use of light wavelengths. Students first learn about behavior of light, amplitude and wavelength through a combination of reading and interactive excercises. Next, students experience how these characteristics of light assist astronomers in making decisions about objects in space. Some very simple activities at this site lead to a wealth of knowledge for the student.