It bears mentioning that the Milky Way is only one of 150 billion galaxies visible to our telescopes - and each of these will have its own complement of planets.









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Seth Shostak
(20.07.1943)
  Astronaut



Astronaut

An astronaut (in the U.S.), cosmonaut (in Russia and many ex-Soviet satellite states) or taikonaut (in China) is a person trained for a spaceflight program to command, pilot, or serve as a crew member of a spacecraft.