Moon the correct values of about 60 and 0.273 respectively. Archimedes (287–212 BC) designed a planetarium that could calculate the motions of the Moon and other objects in the Solar System. During the Middle Ages, before the invention of the telescope, the Moon was increasingly recognised as a sphere, though many believed that it was "perfectly smooth". In 1609, Galileo Galilei drew one of the first telescopic drawings of the Moon in his book and noted that it was not smooth but had mountains and craters. Telescopic mapping of the Moon followed: later in the 17th century, the efforts of Giovanni
Craters of the Moon National Monument and Preserve wilderness area. Skiing is allowed on the Loop Drive after it is closed to traffic in late November because of snow drifts. Typically there are of snow by January and by February. Cross-country skiing off Loop Drive is allowed but may be dangerous owing to sharp lava and hidden holes under the snow. Blizzards and other inclement weather may occur. Craters of the Moon National Monument and Preserve Craters of the Moon National Monument and Preserve is a U.S. National Monument and national preserve in the Snake River Plain in central Idaho. It is along US 20 (concurrent with US