What is Sea of Tranquility? Random facts part 8

Have you heard about Sea if Tranquility? The landing site of Apollo 11 is called Sea of Tranquility. Apollo 11 was the first manned spaceship (spaceship which has people in it) to land on the Moon in 1969. It is a large basaltic plain that appears as a dark patch on the moon. 

SETI-  Acronym for 'Search for Extraterrestrial Intelligence'. It refers the activities undertaken to search for extraterrestrial life. Astronomers use radio telescope to listen for electromagnetic signals that may have been generated by an intelligent beings elsewhere in the Universe. 

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