Outer space

Outer space is the term for the massive amount of empty space on the plane of existence surrounding the entire Earth. It takes up the entire universe.

History


Outer space was first seen when Avatar Aang witnessed a vision of himself walking across a bridge of energy to reach his celestial spirit, thus gaining him mastery over the Avatar State. However, before he could reach his spirit, he sensed Katara was in trouble, so he left to save her, causing the bridge of energy to dissolve away. It was seen again when Aang succeeded in merging with his spirit. This soon collapsed again when Azula struck his back with lightning.

Outer space was seen briefly when Sozin's Comet was shown skimming Earth's atmosphere, as it does every one hundred years.

Description
There is currently little knowledge on the subject of outer space in the Avatar World, though much of it seems comparable to the real world given the similarity of the celestial objects, such as stars, comets, meteors, as well as the Sun and Moon. The basic observations of astronomy have given an understanding of planetary movements as well as basic predictions; from basic waxing and waning of the moon to the arrival of comets and eclipses.

Another similarity is that the planet of Avatar orbits the Sun. However, the moon is more complicated; it exists due to the presence of the Moon Spirit. The moon's force is also dependent on the Moon Spirit. It is not known if the Spirit World's actual location, if there is a physical location, is within the realms of the Avatar World or somewhere in outer space. This emphasizes the fact that outer space is more of a mystery rather than scientific, though it does retain its own plane of existence, just as the Spirit World and physical world do.

There appears to be no scientific or philosophical theories about of what the outer space consists. Experiments and research on outer space by any of the nations have yet to be shown.

Trivia

 * Like acupuncture, full understanding is less important than knowing how to use it. It has been said of Chinese philosophy, "if it works - use it". It is possible that the philosophy of believing in spiritual power coupled with the natural abilities of bending, that the need for further knowledge of outer space is less of a priority.
 * The word "space" was specifically mentioned as the place from where the meteorite that made Toph's bracelet and Sokka's sword came. The characters demonstrated knowledge that the meteorite did not originate from the Earth.

Known visitors

 * Tui
 * Yue
 * Aang (in vision)