E' proprio perché la luce NON segue una traiettoria parabolica, che il terreno è (giustamente) al buio.
In addition to investigations of the intrinsic characteristics of the Spot, it is necessary to verify that geometric factors are all correct. A check of Starry Night shows that, at 0414 UT on 21 July 1969, Earth was 59.5 degrees above the western Tranquility horizon at an azimuth of 270.6. The sun was 14.3 degrees above eastern horizon at an azimuth of about 88.1 degrees. The fact that the azimuth difference between the Earth and the Sun was close to 180 degrees, an image of Earth, if any, would be near the line of Buzz's shadow
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