Astronomy Quiz – Page 6 – Bethea Astrology

Black Holes, Pulsars & Dark Matter!

Reach for the stars—take this astronomy quiz and explore the universe like never before!


        
                    

                
            
#1. Why is 'dark matter' important in astronomy? 
        
            
                
                    
                    It makes stars shine brighter
                
                It makes stars shine brighter            
        
        
            
                
                    
                    It explains why galaxies have extra gravity that holds them together
                
                It explains why galaxies have extra gravity that holds them together            
        
        
            
                
                    
                    It produces all of the stars in the universe
                
                It produces all of the stars in the universe            
        
        
            
                
                    
                    It causes planets to rotate around their stars
                
                It causes planets to rotate around their stars            
        
Dark matter accounts for the extra gravitational force observed in galaxies, holding stars and matter together despite insufficient visible mass.
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