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]
GPS stands for Global Positioning System. The system is made up of at least 24 satellites orbiting the Earth. The satellites communicate with specialized receivers on the ground, providing the exact position of the receivers. As of this writing, there are 31 operational satellites in the GPS constellation. Put in place by the US military starting in 1989, the GPS satellite constellation transmits a signal for its own use and a separate signal that anyone with the technological wherewithal is free to access.