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Famous for his work, The Exploration of Cosmic Space by Means of Reaction Devices, he is considered the father of human space flight and the first man to conceive the space elevator -- a hypothetical structure designed to transport material from a planets surface into space.

  1. Pierre Louis De la Mer
  2. Jules Verne
  3. R.H. Goddard
  4. Konstantin Tsiolkovsky

Answer

The correct answer is D) Konstantin Tsiolkovsky.

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