Читать книгу Universe: The story of the Universe, from earliest times to our continuing discoveries - Peter Grego - Страница 23

Virtually a double planet, the Earth-Moon system is contained within a cube 1,000,000km across. Light would take just 3 seconds to get from one side to the other. This view shows the comparative size and brightness of the Earth and the dull grey Moon. The Moon has no atmosphere; no clouds ever appear in the Moon’s skies, rainfall never quenches the dry lunar soil and no rivers flow on its surface. Our only natural satellite has always been dry and lifeless, its surface subject to harsh treatment from cosmic impactors.