Space is generally defined to be 100km above earth's surface, an arbitrary point called the Karman Line [1]. Orbit is when an object is traveling so fast that

Space is generally defined to be 100km above earth's surface, an arbitrary point called the Karman Line [1]. Orbit is when an object is traveling so fast that it reaches the horizon of a body before the body's gravity can pull it down to the surface, but perpetually. It's basically perpetually falling around the body. Imagine one of those guys in a wingsuit skimming along the surface of a mountain, never actually touching the surface. It's similar to that, but at a much higher scale. 1) https://en.wikipedia.org/wiki/K%C3%A1rm%C3%A1n_line https://en.wikipedia.org/wiki/K%C3%A1rm%C3%A1n_line