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
Craters of the Moon National Monument and Preserve of the Moon are under great environmental stress due to constant dry winds and heat-absorbing black lavas that tend to quickly sap water from living things. Summer soil temperatures often exceed and plant cover is generally less than 5% on cinder cones and about 15% over the entire monument. Adaptation is therefore necessary for survival in this semi-arid harsh climate. Water is usually only found deep inside holes at the bottom of blow-out craters. Animals therefore get the moisture they need directly from their food. The black soil on and around cinder cones does not hold moisture for long, making