Flight is the process by which an object moves, through an atmosphere (especially the air) or beyond it (as in the case of spaceflight), by generating aerodynamic lift, propulsive thrust, aerostatically using buoyancy, or by ballistic movement, without direct support from any surface.
Many things fly, from natural aviators such as birds, bats and insects to human inventions such as missiles, aircraft such as airplanes, helicopters and balloons, to rockets such as spacecraft.
The engineering aspects of flight are studied in aerospace engineering which is subdivided into aeronautics, the study of vehicles that travel through the air, and astronautics, the study of vehicles that travel through space, and in ballistics, the study of the flight of projectiles.
Famous quotes containing the word flight:
“One mans observation is another mans closed book or flight of fancy.”
—Willard Van Orman Quine (b. 1908)
“Fear of error which everything recalls to me at every moment of the flight of my ideas, this mania for control, makes men prefer reasons imagination to the imagination of the senses. And yet it is always the imagination alone which is at work.”
—Louis Aragon (18971982)
“Here I am.... You get the parts of me you like and also the parts that make you uncomfortable. You have to understand that other peoples comfort is no longer my job. I am no longer a flight attendant.”
—Patricia Ireland (b. 1935)