Astronomy vocab quiz ch. 2 Crossword
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
 
 
Down: 2) A feeling of weightlessness felt in orbit.4) The velocity a rocket must reach to fly beyond a planet's gravitational pull.6) The velocity a rocket must achieve to establish an orbit around Earth.9) The reaction force that propels a rocket forward. Across: 1) A place that is empty of all matter.3) The collection of information about Earth and other objects in space without being in direct contact.5) A spacecraft that carries scientific instruments that can collect data, but has no human crew.7) Small robots that move around on the surface of a planet.8) An object that revolves around another object in space.10) An orbit in which a satellite orbits Earth at the same rate as Earth rotates and thus stays over the same place on Earth all the time.11) A spacecraft that can carry a crew into space, return to Earth, and then be reused for the same purpose.12) A device that expels gas in one direction to move in the opposite direction.13) A large artificial satellite on which people can live and work for long periods.14) An item that has uses on Earth but was originally developed for use in space.15) A speed in a given direction.
 

 

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