All dimensions Wiki
All dimensions Wiki

Hubble Ultra Deep Field part d-1-.jpg

The Outer Space is you can find anywhere like planets, stars, galaxy, and more. We are not living in Outer Space. You can find better things with using Telescope. If you go to outer space, you need an space clothing.


Outer space is broadly defined as anywhere that's not within an atmosphere or any other solid matter. Officially, it begins at exactly 100 kilometres above the Earth's sea level, though the exact boundary varies depending on which celestial body you are on. This is not yet an issue, due to humanity's lack of planetary colonisation.


There are various different types of outer space, distinguished by how "outer" they are:


The thermosphere is the part of the upper atmosphere that in in outer space. Nonetheless, it is still dense enough to provide significant drag on orbiting satellites necessitating their occasional boosting or eventual deorbiting. Since the lunar landings, no humans have left Earth's thermosphere.


The exosphere is the outer space containing gas molecules that are still gravitationally bound to their planet. Most celestial bodies have exospheres of some sort. Humans have never passed outside Earth's exosphere in the history of space exploration.

Interplanetary Medium

The interplanetary medium is the outer space between planets. It has about 107 particles per cubic metre, but this can increase to 109 during periods of high solar activity.

Interstellar Medium

The interstellar medium is the outer space between stars. It contains about 106 particles per cubic metre.

Intergalactic Medium

The intergalactic medium is the outer space between galaxies. It is very tenuous, with about 10 to 100 particles per cubic metre depending on the precise location.


Voids are the least dense region of outer space. They are absent of almost all matter, with less than one particle per cubic metre.