Under construction.
 | Fig. 43. The Shute sphere. Map of moon's eastern hemisphere, showing the regions from which a body, leaving the moon's surface vertically at the stated velocity, would reach the earth. Redrawn from Shute, 1966 (Astronomical Journal, vol. 71, p. 606; © 1966, The American Institute of Physics). Click below for larger view.
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 | Fig. 44. Chapman's chart showing initial direction required for ejecta from various lunar craters to reach the earth. These are nearly parallel to the vertical directions indicated on the Shute sphere. Redrawn from Chapman (1964). Click below for larger view.
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