1
											
							radiation left over from the beginning of the universe
						
					
								
					2
											
							before inflation 3 of the 4 fundamental forces combined in a manner described by ...
						
					
								
					3
											
							a value in Einstein's relativity equation that represents a repulsive force
						
					
								
					4
											
							the portion of the universe within the cosmic horizon 
						
					
								
					5
											
							value of mass and volume used to determine if the Universe will be open or closed
						
					
								
					6
											
							universe that collapses as a "Big Crunch" perhaps leading to the birth of a new universe
						
					
								
					7
											
							The maximum distance an observer can see out into the universe
						
					
								
					8
											
							If the universe extends forever and has existed forever, the night sky should be bright
						
					
								
					9
											
							Scenario - the expansion of the universe becomes zero when the Universe has reached infinite size
						
					
								
					10
											
							expanding forever version of the universe, all hydrogen consumed, universe becomes black and empty
						
					
								
					11
											
							opposite of ordinary matter, since all particles are made in pairs
						
					
								
					12
											
							the study of the structure and evolution of the Universe
						
					
								
					13
											
							In general all galaxies recess according to ____ __
						
					
								
					14
											
							A hot, dense, violent burst of matter and energy that began the Universe