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Space , Space is the three-dimensional extension in which all things exist and move. Intuitively, it feels that we live in an unchanging space. In this space… Extravehicular Activity (manned Space Flight) , Space Walks
A space walk, also known as extravehicular activity (EVA), is an activity or maneuver performed by an astronaut outside a spacecraft. Ast… Astronauts , Cosmonauts are the Russian counterparts to American astronauts. During the early years of the "space race" between the two superpowers, the United St… Mark , mark1 / märk/ • n. 1. a small area on a surface having a different color from its surroundings, typically one caused by accident or damage: the blow… Vehicles , Space vehicles encompass different categories of spacecraft, including satellites ,rockets , space capsules ,space stations , and colonies. In genera… Outer Space , The fame of the first achievements in outer space in the 1950s and the high cost of space pro-grams have encouraged a general belief that a new and r…
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NEARBY TERMS
mark-space ratio