Space launch

Space launch is the earliest part of a flight that reaches space. Space launch involves liftoff, when a rocket or other space launch vehicle leaves the ground, floating ship or midair aircraft at the start of a flight. Liftoff is of two main types: rocket launch (the current conventional method), and non-rocket spacelaunch (where other forms of propulsion are employed, including airbreathing jet engines).

The has established the Kármán line at an altitude of 100 km (62 mi) as a working definition for the boundary between aeronautics and astronautics. This is used because at an altitude of about 100 km (62 mi), as Theodore von Kármán calculated, a vehicle would have to travel faster than orbital velocity to derive sufficient aerodynamic lift from the atmosphere to support itself.^[2]^: 84^[3]

Fédération Aéronautique Internationale

Up until 2021, the United States designated people who travel above an altitude of 50 mi (80 km) as .^[4]^: 16 Astronaut wings are now only awarded to spacecraft crew members that "demonstrated activities during flight that were essential to public safety, or contributed to human space flight safety".^[5]

astronauts

's Space Shuttle used 400,000 ft, or 75.76 miles (120 km), as its re-entry altitude (termed the Entry Interface), which roughly marks the boundary where atmospheric drag becomes noticeable, thus beginning the process of switching from steering with thrusters to maneuvering with aerodynamic control surfaces.^[6]

NASA

^[usurped] A periodic news digest of worldwide space launch activity.

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LATEST SATELLITE LAUNCHES from http://www.n2yo.com/

is an online publication devoted to in-depth articles, commentary, and reviews regarding all aspects of space exploration.