Reader Challenge Update

Robert Hutchings Goddard (1882-1945)
No winners so far in the Reader Challenge. Nobody knows? I'm going to make this interesting then. Here is your first clue:
What do Konstantin Tsiolkovsky, Robert Esnault-Pelterie, and Robert Hutchings Goddard have in common?
Type your answers here.


1 Comments:
They all were involved in spaceships/rocketry/etc.
Yes?
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