Outer-space definitions

Any region of space beyond limits determined with reference to the boundaries of a celestial body or system, especially:
  • The region of space immediately beyond Earth's atmosphere.
  • Interplanetary or interstellar space.
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Space beyond the atmosphere of the earth.
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Space outside the solar system.
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Region outside explored space.
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Any region of space beyond limits determined with reference to boundaries of a celestial system or body, especially the region of space immediately beyond Earth's atmosphere.
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A bluish shade of black.

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Attributive form of outer space, noun.
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Origin of outer-space

From outer + space.