| This section introduces some of the basic tools used 
							by Astronomers to gather data. These will be in the 
							form of 
							mathematical equations used to solve things 
							like:
 Some of the equations will use 
							physical constants 
							- like "c" for the speed of 
							light. For more 
							information, visit the
							Constants page. 
							Reference material and examples for this section is from: Freedman, Roger and William Kaufman. Universe. 
							7th Edition. W.H. Freeman and Company. New York, 
							2002.    |