Astronomy Crossword
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
 
 
Down: 1) The velocity an object must reach to fly beyond a planet's or moon's gravitational pull.2) Russian space explorer.3) Speed in a given direction.4) The velocity a rocket must achieve to establish an orbit around a body in space.5) A place that is empty of all matter.6) A large artificial satellite on which people can live and work for long periods.7) The first artificial satellite.10) First American in space who was part of the U.S. Mercury.11) The American effort to land astronauts on the moon.15) A small robotic space probe that can move about the surface of a planet or moon.16) First American to orbit Earth.17) An object that revolves around another object in space. Across: 6) An item that has uses on Earth but was originally developed for use in space.8) A spacecraft that can carry a crew into space, return to Earth, and them be reused for the same purpose.9) The first human into space who flew one orbit.12) A government agency in charge of its space program.13) The condition of experiencing weightlessness in orbit.14) An orbit in which a satellite orbits Earth at the same rate as Earth rotates and thus stays over the same place all the time.18) One of the men who landed on the moon. First man to step on the moon.19) American space explorer.
 

 

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