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
Solar eclipses on the Moon the surface appears not just black but red and brown (according to the Danjon scale) because the only sunlight available is refracted through the Earth's atmosphere on the edges of the Earth forming an atmospheric ring as it is shown in the sky in a painting by Lucien Rudaux. During eclipses with long totality, temperatures plunges but not in many parts of its mares especially Oceanus Procellarum and Mare Tranquillitatis, and mid to large craters (especially with basalt floor) mostly in the middle portion of the Moon, some young craters and a few distant large craters, notably Tycho (being located