Space, also known as the outer space, is the vacuum that all of the planets, stars, galaxies and other objects are in. The planet Earth is in space, as well as all the other stars and planets in the Universe.

Space can be thought of as a three dimensional grid in which everything moves about. Just because something exists there, does not mean that what is contained in it is not exposed to space. You are exposed to space and are moving through it. The extent to which space reaches is unknown, as the distant edges of the universe have yet to be examined. According to the big bang theory, not even space existed before the creation of the universe. After the big bang, space expanded outwards to give rise to the vast expanse that is known today.

Space, just like physical objects, can be altered. The force which alters space is gravity, and some theories have postulated that powerful rings of light can also warp space. When space is warped, it can be traveled through in a shorter amount of time relative to the unwarped portion.

Examination by modern technology shows that space appears to be made of nothing, and thus only energy with particle-like behaviors can travel through it (i.e. light, x-rays). Sound cannot travel through space because there is no medium for the energy to move through.

Physics

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