Most data used for these images was acquired at the Buffalo Ridge Observatory (Bortle 1-2) near Como, Colorado. Additional data from Denver. The distance of many of these images is expressed in terms of a "light-year." How far is that? If you could travel at the speed of light, you could circle the earth more than 7 times in one second. At that speed, traveling for one year, you could travel a distance of one light-year. Another way to look at it is this: light travels at about 671 million miles/hour. Travel at that speed for a year and you're traveled a light-year.
































