uses photographs and sky charts to form a connection between what is seen on the ground and in the sky, and looks at the deeper scientific meaning behind these sights.  Nordgren describes other objects in the Solar System with features similar to those on Earth and links the geological features seen in the national parks to the very latest NASA spacecraft discoveries on other planets and their moons.  Additionally, historical context is discussed to show why we humans (who have lived in and around our national parts for tens of thousands of years) have always been astronomers. weiterlesen