A Contribution to the Study of Galactic Dimensions by Shapley H. PDF

By Shapley H.

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Over the next 250 years, the exploration of the universe by telescope resulted in one discovery after another. Astronomers who built their own telescopes and their own observatories made many of the discoveries. It is a tradition that continues today with many amateurs who practice rooftop and backyard astronomy. German-Polish astronomer Johannes Hevelius (1611–87), for example, drew and published the first detailed map of the surface of the Moon in 1647. Jan Hewel, was born in Danzig, Poland, and had Latinized his name, as was the custom among scientists and scholars, to Hevelius.

Sputnik 1 initiated the “space race” between the Soviet Union and the United States in earnest. S. S. satellite, Explorer 1, into orbit on January 31, 1958. The first successful Vanguard launch was March 17, 1958. Exploration of space by rocket—born out of military competition but inspired by a generation of amateurs and dreamers—had begun. 4 Astronauts and Cosmonauts Human space exploration, like earlier rocket development, grew out of the military confrontation between the major world powers.

Although the photographs did not show a tremendous ICBM arsenal, the information might be incomplete. S. security. Meanwhile, the Soviet program of launching satellites and beginning preparations for manned space travel went forward. ” The fact that the Americans were beginning a manned program known as Project Mercury in 1958 spurred on the Soviets. ” The name choice was to suggest that the progress of the human race came from the Soviets, not from the West. COSMONAUT VS. ASTRONAUT: The Race for Space The Soviets called their spacecraft pilots “cosmonauts” while the Americans planned to put “astronauts” in space.

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A Contribution to the Study of Galactic Dimensions by Shapley H.

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