Illustration depicting the Earth rising above the Moon's horizon as seen from an orbiting spacecraft. The area of the Moon's surface seen here appears in the upper left quadrant when viewed from Earth. The lower right of the frame is dominated by the Mare Imbrium (Sea of Rains), the bow-shaped bright feature just below centre is the Jura Mountain range which rings the Sinus Iridium (Bay of Rainbows). Next to the limb at top left is the large Pythagoras Crater, with the smaller Babbage-A Crater just below it. The lower left of the frame is part of the Oceanus Procellarum (Ocean of Storms).