 How are people on Earth able to help with the search for a missing prospector?
The meteor, a pebble, a little larger than a match head, traveled through space and time since it came into being. The light from the star that died when the meteor was created fell on Earth before the first lungfish ventured from the sea. The shaft tried to tie itself into a knot, and the blades, damaged and undamaged were spit through the casing. It was just before sunset on a spring evening in September in Sydney. The shadow line between day and night could be seen from the Moon to be drifting across Australia. Evans, who had no watch, thought of the time as a quarter after Australia. Evans was a prospector, and like all prospectors, a sort of jackknife geologist, selenologist, rather. When he was broke, which was usually, he used his tractor to haul uranium ore and metallic sodium from the mines at Potter's dike to Williamson Town, where the rockets landed. Once he followed a stampede to Yellow Crater, where he thought for a while that he had a fortune in chromium. Four days reserve—plus one is five—plus sixteen days normal supply equals twenty-one days to live. In seventeen days he might be missed, but in seventeen days it would be dark again, and the search for him, if it ever began, could not begin for thirteen more days. By the light of this, he reinspected the steam system, and found about three gallons of water frozen in the condenser. The condenser, like all condensers, was a device to convert steam into water, so that it could be reused in the boiler. This one had a tank and coils of tubing in the center of a curved reflector that was positioned to radiate the heat of the steam into the cold darkness of space. This boiling lowered the temperature, and the condenser demonstrated its efficiency by quickly freezing the water in the tank. If there was any water in the boiler, it would operate the engine that drove the generator. Then, if the pump wasn't blocked by ice, it would return the water to the boiler. It was three days' supply of water, if it had been carefully used. They might have appeared to waver slightly, if they were behind outflung corona flares. When Director McIlroy came into his office, he found it lighted by the rising sun. This was to allow the air-conditioning system to function properly, and to prevent air loss in case of the highly improbable meteor damage.
 They can see different sides of the moon from the people on the moon
 They can shine a light to make searching easier  Their equipment is advanced enough to connect to the prospector's radio  They can boost the signals of the scanners on the moon  They can see different sides of the moon from the people on the moon