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Traffic Engineering , Traffic Control
In the early twenty-first century, there are approximately 5000 commercial and private airplanes in the air at any one moment. The ta… 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… Marketplace , Marketplace
Since the 1960s, the market for commercial space operations has been limited almost entirely to communications satellites and commercial… Vehicles , Space vehicles encompass different categories of spacecraft, including satellites ,rockets , space capsules ,space stations , and colonies. In genera… 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… 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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