As the moon revolves round the earth, sufficiently near to pass through the shadow of the earth, an eclipse must always take place when the earth, the sun, and the moon, are all in one straight line. An eclipse of the moon can never happen butanbsp;...
Title | : | Systematic Education: Or, Elementary Instruction in the Various Departments of Literature and Science |
Author | : | William Shepherd |
Publisher | : | - 1822 |
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