# Is there gravity in outer space? Explain.

Gravity is the longest range force that comprise our Universe, and is a property of matter, so where there's matter, there's gravity.  On Earth we experience it as the phenomenon of "falling down."  If you stand on the Earth and drop a teacup, it falls and smashes on the ground; we say that gravity pulled it to the Earth.  However, the teacup, because it is also matter, pulls the Earth towards itself, however weakly. Each piece of matter in the Universe is attracted to and attracted by every other piece of matter.  For the most part, this attraction is extremely weak, but extremely pervasive.  The force of gravity weakens over distance fairly quickly, but it never becomes zero.  In outer space, for example, which is mostly a vacuum, there's barely any gravitational force but it is in fact there; some estimates claim in deep space you may find just one atom in a cubic metre of space.  Conversely, where there's a lot of matter, there's a lot of gravity.  The gravitational force found near a star, for example, is huge because the star is massive.  Bigger stars have more gravity; ultimately, Black Holes possess so much gravitational force no piece of matter can move away from it if it gets close enough, and the force it possesses is quite strong even at huge distances.

Approved by eNotes Editorial

Is there gravity in space?Explain why? please

Gravitational attraction is inversely proportional to the square of the distance from the center of gravity of a mass. In theory, there is no "cutoff" or "horizon" where the gravitational attraction of, for instance, the sun, will diminish to precisely zero. This in turn means that all of space is subject to the influence of multiple gravitational fields, even though the force exerted by such fields may be imperceptibly tiny.

The apparent lack of gravitation in space is caused by objects in orbit, for instance, being in a state of free fall. In such a state, the forces acting on the object are uniformly distributed over the object's mass. In an orbiting spacecraft, for instance, both the spacecraft and an astronaut inside it are subject to gravity (otherwise they would stop orbiting and fly off in a straight line). However, the force of gravity is acting uniformly on both the spacecraft and the astronaut and so it cannot be sensed -- it is not, for instance, dragging the astronaut in a certain direction, the way gravity drags a person down on earth.