Autor/-in: Bruce Betts

DR. BRUCE BETTS. is a planetary scientist who loves teaching people about planets, space, and the night sky in fun and entertaining ways. He is the chief scientist for the world's largest space interest group, The Planetary Society, where he heads both the Science and Technology and the Education and Outreach programs. He regularly writes for a variety of online and print publications, including The Planetary Report and his blog, planetary. org. Learn more at RandomSpaceFact. com.