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]
A satelliteâs orbit depends on its speed and distance from Earth. Below, the main orbit types are listed and defined. 1. LEO (Low Earth Orbit) - When a satellite circles close to Earth, itâs in Low Earth Orbit. Satellites in LEO are just 200-300 miles high. Because they orbit so close to the Earth, they must travel very fast (17,000 mph) so the gravity canât pull them back into the Earthâs atmosphere. a. Polar orbit-A satellite in polar orbit travels a north-south direction.