A History of Space Travel

By Tim Lambert The beginning of space exploration In the early 20th century Konstantin Tsiolkovsky (1857-1935) realized that only a rocket could provide propulsion in the near-vacuum of space. He also proposed that a rocket should be built in stages so it would dump each stage when its fuel was exhausted. In 1926 Robert H.… Continue reading A History of Space Travel

A History of the Moon

By Tim Lambert Observing the Moon The Moon has always been visible, of course, but the Ancient Greeks were the first people to begin to understand it. About 450 BC, an Ancient Greek called Anaxagoras realized that the Moon does not shine with its own light. Instead, its light is reflected from the Sun. Another… Continue reading A History of the Moon

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