outer space

Also known as space, deep space, exosphere, extra-atmospheric space

void between celestial bodies

AI overview

Outer space is the vast emptiness that exists between planets, stars, and other celestial bodies. It matters because understanding it helps us learn about the universe and our place within it.

AI-generated from the Wikipedia summary — may contain errors.

Wikidata facts

Instance of: region
Subclass of: space
Image: Hubble Ultra Deep Field part d.jpg
Has use: space colonization

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Commons category: Outer space
topic's main category: Category:Outer space
opposite of: Earth
topic's main Wikimedia portal: Portal:Space
name: delin
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4
hashtag: space
exact match: purl.obolibrary.org/obo/ENVO_01000637
facet of: universe
studied by: space exploration
used by: spacecraft
contains: space object

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Encyclopedic overview

Being essentially empty, outer space allows the earliest (redder) galaxies to be viewed without obstruction, as in the Webb's First Deep Field image.

Outer space, or simply space, is the expanse that exists beyond Earth's atmosphere and between celestial bodies. It contains ultra-low levels of particle densities, constituting a near-perfect vacuum of predominantly hydrogen and helium plasma, permeated by electromagnetic radiation, cosmic rays, neutrinos, magnetic fields and dust. The baseline temperature of outer space, as set by the background radiation from the Big Bang, is 2.7 kelvins (−270 °C; −455 °F).

Excerpted from Wikipedia’s “outer space” article, available under the CC BY-SA 4.0 licence.