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
A Trip to the Moon him for "A Trip to the Moon", Méliès credited Jules Verne's novels "From the Earth to the Moon" (1865) and "Around the Moon" (1870). Cinema historians, the mid-20th-century French writer Georges Sadoul first among them, have frequently suggested H. G. Wells's "The First Men in the Moon" (1901), a French translation of which was published a few months before Méliès made the film, as another likely influence. Sadoul argued that the first half of the film (up to the shooting of the projectile) is derived from Verne and that the second half (the travelers' adventures on and in the moon)