Outer Space Definition

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Outer space definition. Not in technical usage any region of space beyond the atmosphere of the earth. Definition of outer space. The part of space that is very far away from earth 2. 1979 1986 harpercollins publishers 1998 2000 2003 2005 2006 2007 2009 2012.
Outer space any location outside the earth s atmosphere. Space immediately outside the earth s atmosphere broadly. Interplanetary or interstellar space. The first major milestone in space exploration was in 1957 when the ussr s sputnik 1 orbited 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. Location a point or extent in space. Collins english dictionary complete unabridged 2012 digital edition william collins sons co.