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:
“No Ravens wing can stretch the flight so far
As the torn bandrols of Napoleons war.
Choose then your climate, fix your best abode,
Hell make you deserts and hell bring you blood.
How could you fear a dearth? have not mankind,
Tho slain by millions, millions left behind?
Has not conscription still the power to weild
Her annual faulchion oer the human field?
A faithful harvester!”
—Joel Barlow (17541812)
“It is marvelous indeed to watch on television the rings of Saturn close; and to speculate on what we may yet find at galaxys edge. But in the process, we have lost the human element; not to mention the high hope of those quaint days when flight would create one world. Instead of one world, we have star wars, and a future in which dumb dented human toys will drift mindlessly about the cosmos long after our small planets dead.”
—Gore Vidal (b. 1925)
“When we are high and airy hundreds say
That if we hold that flight theyll leave the place,
While those same hundreds mock another day
Because we have made our art of common things ...”
—William Butler Yeats (18651939)