What Is Outer Space

Collins english dictionary complete unabridged 2012 digital edition william collins sons co.

What is outer space. Word of the day. Interplanetary or interstellar space. From the perspective of an earthling outer space is a zone that occurs about 100 kilometers 60 miles above the planet where there is no appreciable air to breathe or to scatter light. Definition of outer space.

Space also known as outer space is the near vacuum between celestial bodies. It is where everything all of the planets stars galaxies and other objects is found. Outer space also simply called space refers to the relatively empty regions of the universe outside the atmospheres of celestial bodies. Not in technical usage any region of space beyond the atmosphere of the earth.

Outer space is not completely empty it is a hard vacuum containing a low density of particles predominantly a plasma of hydrogen and helium as well as electromagnetic radiation magnetic fields neutrinos dust and cosmic rays. Outer space is used to distinguish it from airspace and. 1979 1986 harpercollins publishers 1998 2000 2003 2005 2006 2007 2009 2012. Outer space or simply space is the expanse that exists beyond earth and between celestial bodies.