Astronomy Assignment #8: CRATERING
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When a meteorite hits one of the terrestrial planets it makes a crater with a diameter of about 20 times the diameter of the impactor (the book says x10 but x20 is more typical). Estimate the size of ... the impactor that made the following four craters: (1 pt.) (a) During the Apollo program the astronauts found lots of craters about 500 meters in diameter. When an impactor such as a meteorite hits the surface of terrestrialplanets, they leave excavations known as craters. The craters are in circular shape because when the meteorites strike they tend to throw debris outwards thereby creating circular shape; this is however not the result of the shape of the impacting meteorite. The impact caused by an impactor sends shock waves from site of the impact excavating a hole much larger in size than the diameter of the impactor. The result is a cavity subsequently called a crater that is 20 times bigger in diameter than the impactor (LPI, 2019). A crater that is 500m in diameter will have been caused by an impactor that is 20 times less in diameter as below: =500/20 =25m in diameter. [Show More]
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