ZeleznikPeter AndersonGSC 15811 November 1999Quasars and Active Galaxies The astronomical world is full of phenomena beyond the average person’s imagination. The technical tools and analytical methods astronomers use are very complex. The enormous numbers and distances are mind boggling. Theories behind astronomical phenomena are based on yet another theory. In order to understand the concept of quasars and active galaxies, one must first have a feel for the astronomical numbers involved. Secondly, a basic knowledge of the tools of the trade, and finally, a working knowledge of astronomical jargon. Once there is a working knowledge of the aforementioned factors, then there is the chance that one could be able to assimilate the complex theoretical properties that are used to discuss quasars and active galaxies. In order to understand the large numbers used to express the vast distances discussed in astronomy, one needs to relate these numbers to everyday life. During everyday conversation, people may say things like “the national debt is trillions of dollars,” “the lottery is up to 31 million dollars,” or “John Doe is a billionaire.” An astronomer might say that “one astronomical unit equals 93,000,000 miles or that a light-year is 5,870,000,000,000,000 miles.” The human comprehension level of all of these terms is probably nowhere near the actual truth behind how large these numbers really are. To obtain a feel for these gigantic distances used by astronomers, Astronomy Magazine writer, John P. Wiley says it may be helpful to keep in mind that it takes thirty-one years to count to one billion at the rate of one number per second. He also puts a voyage to a galaxy that is a billion light-years away into perspective by calculating how long it would take to get there in a vessel speeding along at 18,000 miles an hour. The trip would take 37 trillion years. When dis...
