For grades 2-5. From the acclaimed Science Screen Report DVD series, provided to schools nationwide free of charge since 1970. Baked and irradiated, Mercury is a cratered world; pock-marked by impactors that rained from space during the early development of our Solar System. With double sunrises, its day is twice as long as its year. Mercurys orbit is now perpetually shadowed from the scorching Sun; scientists think there may be ice deposited by comets. In contrast, the un-Earthly Venus is a …
Tags: Comet, radiation, screen, Uranus