Refracting telescope focus, results in a non-inverted and upright image. Galileo’s best telescope magnified objects about 30 times. Because of flaws in its design, such as the shape of the lens and the narrow field of view, the images were blurry and distorted. Despite these flaws, the telescope was still good enough for Galileo to explore the sky. The Galilean telescope could view the phases of Venus, and was able to see craters on the Moon and four moons orbiting Jupiter. Parallel rays of light from a distant object (y) would be brought to a focus in the focal plane of the
The Man Who Sold the Moon The Man Who Sold the Moon "The Man Who Sold the Moon" is a science fiction novella by American author Robert A. Heinlein, written in 1949 and published in 1950. A part of his "Future History" and prequel to "Requiem", it covers events around a fictional first Moon landing in 1978 and the schemes of Delos D. Harriman, a businessman who is determined to personally reach and control the Moon. Delos David "D. D." Harriman, "the last of the Robber Barons", is obsessed with being the first to travel to—and possess—the moon. He asks his business partner, George Strong, and