A memoir is a type of autobiography wherein the main content of a written material is about the writer.It is a genre of literature that involves writing about certain aspects and concerns of a personâs life. memoir is a type of autobiography wherein the main content of a written material is about the writer.
There have been about 8000 man made objects launched into space - only a handful left Earth orbit. Some have decayed and reentered. There are about 3000 satellites currently in orbit. Only about 1000 of those are active. But there are other objects, too, such as spent rockets. Some objects have broken apart because of collisions. There are about 20,000 objects in orbit that are 10 cm in diameter, or larger.
Satellites are objects orbiting a planet. The moon is a natural satellite. Artificial satellites are those put into orbit by man. The first artificial satellite was Sputnik I launched by the Soviet Union in 1957. Now almost fifty years later there are thousands of satellites orbiting the Earth at various heights.