It's difficult to find time for student's to research all the planets in our solar system, this makes it a little easier. Students become an expert on one of the planets to share with the class. Each group researches a different planet and however you choose to present them, every student gets exposed to information about EVERY planet. Thirteen requirements with point values for each are included like: size, distance from sun, topography, gravity, temperature and climate, an interesting fact, why it could/couldn't support human life, etc.
Planning suggestions included at the bottom and the second page has 4 grading sheets to make it easy to score as the groups present.