Page 173 to 186 Crossword
                  
                  
                  
                  
                  
                  
                  
                  
                  
                  
                  
                  
                  
                  
                  
                  
 
 
Down: 1) a disk-shaped region on the edge of the solar system that contains masses of ice and icy rock, believed to be the source of comets with orbital periods of less than 200 years.2) a meteoroid that reaches Earth's surface without burning up.3) a celestial body that orbits the sun and is round because of its own gravity.5) a celestial body moving about the sun, usually in a highly eccentric orbit, consisting of a central mass surrounded by an envelope of dust and gas that may form a tail that streams away from the sun.6) Also called minor planet. Astronomy . any of the thousands of small bodies of from 480 miles (775 km) to less than one mile (1.6 km) in diameter that revolve about the sun in orbits lying mostly between those of Mars and Jupiter.7) a region of the solar system far beyond the orbit of Pluto in which billions of comets move in nearly circular orbits unless one is pulled into a highly eccentric elliptical orbit by a passing star. Across: 4) a bright streak of light that results when a meteoroid burns up in Earth's atmosphere.8) any of the minor bodies in the Kuiper Belt outside the orbit of Neptune.9) a sand grain- to boulder-sized, rocky body that travels through space.
 

 

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