Word: sunlight
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Dates: during 1950-1959
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...Next day the chiseling continued while El Malakh and a group of colleagues waited impatiently. At last the hole was big enough for him to peek inside. In the excitement he forgot to bring a flashlight, so he used a mirror (as the ancient Egyptians probably did) to shoot sunlight into the darkness...
...moon's rugged topography. So the Naval Observatory (as interested in practical geodesy as the Air Force is) has supplied a new and accurate map of lunar mountains and plains that will show on June 30 at the edge of the moon's disk. Shafts of sunlight slipping through lunar passes can be allowed for in figuring totality. If such calculations were not made, the error of fitting the North Atlantic to missile warfare would increase about ten times...
Singer believes that the Mouse will stay up long enough to send back a wealth of information. It can analyze virgin sunlight that has not been altered by passing through the atmosphere. It can measure the earth's magnetic field, catch cosmic rays and observe the particles shot from the sun that cause the aurora...
...that the Mouse has gathered in its last trip from pole to pole. Brief messages are desirable, because electric power will have to come from some sort of battery. Later on, thinks the professor, a Supermouse can be sent up higher, stay up longer, and get its power from sunlight...
Turning the sun's energy directly into electricity has long been a goal of scientists. In Washington last week, the Bell Telephone Laboratories demonstrated a solar battery which can convert sunlight into usable electric current without costly intermediate steps...