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
First Men to the Moon investigating the interior of the moon using seismograph-equipped solid propellant rockets. According to WorldCat, the book is in 413 libraries. Floyd C. Gale said that the fictional moon trip was "highly detailed and absorbing", and praised the "exceptional" illustrations. He concluded that "Even the best grounded SF buff will find new and astonishing material over which to dream". First Men to the Moon First Men to the Moon is a novel by rocketry expert Wernher von Braun, published in 1960. It tells the story of John Mason and Larry Carter, fictional astronauts traveling to the moon. Von Braun's book is