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…I have comprehended your explanation thoroughly, and your wisdom in speaking is evident. However, what causes the variation in its illumination, with it occasionally appearing full, then half, and now taking on diverse shapes, as depicted on the terrestrial globe?Cosmiel: As you are undoubtedly aware from the field of Optics, every opaque object…
https://www.wichita.edu/academics/fairmount_las/geology/wparcell/Kircher/IterII/index.php