 What is the landscape of Ganymede like?
Its reddish tinge brightened the office noticeably, for such of Ganymede's surface as could be seen through the transparent dome outside the office window was cold, dim and rugged. The glowing semi-disk of Jupiter was more than half a million miles distant. Maybe they live soft back on Earth since the mines and the Jovian satellite colonies grew; but they were out here in the beginning, most of them. Sometimes there's no reason but them for sending a ship back with a crew instead of in an economy orbit. They found they could send back loaded ships by 'automatic' flight—that is, a long, slow, economical orbit and automatic signalling equipment. Then he headed the tractor across the frozen surface of Ganymede toward the permanent domes of the city.
 Frozen, cold, and dim
 Steaming hot and rugged  Riddled with volcanic puffballs  Frozen, cold, and dim  Steep mountains of rock and ice