This Week's Geo-Quiz: Other Planets

Geologists are working in a delicious age: Using spacecraft, we have now taken close-up looks at all of the rocky planets, the rocky satellites, and several major and minor asteroids, and at the moment we have documented thousands of planets circling other stars. In another decade the planetary catalog will support a cadre of graduate students and professors. The conversations that have started between geologists, planetologists and exoplanetographers are already really exciting. How ready are you for their brilliant future? Test your knowledge in the Planets Geo-Whiz Quiz.