Memoir, autobiography, biography. A memoir is a special kind of autobiography, usually involving a public portion of the authorâs life as it relates to a person, historic event, or thing. The text is about the personal knowledge and/or experiences of the author. literary agent discusses the contents of a quality memoir and how it differs from an autobiography or biography. Memoirs are perennially popular with many new books coming out each year. The bestseller, Night, by Elie Wiesel, is a memoir, not an autobiography or biography.
According to CelesTrak there are 2,691 inactive satellites in orbit. 1,490 satellites are active for a total of 4,181. [1] The UCS Satellite Database has an equivalent number. [2]
Most of the satellites in medium earth orbit circle the earth at approximately 6,000 to 12,000 miles above the earth in an elliptical orbit around the poles of the earth. Any orbit that circles around the poles is referred to as a 'polar orbit'.atellites in this orbital range also have a very small 'footprint'--that is, the surface of the earth that can be covered by the signal broadcast from the satellite is small. Thus, lots of satellites (35 or more) are required to make worldwide communication possible.