deep space

American  

noun

1. space beyond the limits of the solar system.

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deep space British  

noun

1. any region of outer space beyond the system of the earth and moon

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Other Word Forms

• deep-space
  adjective

Etymology

Origin of deep space

First recorded in 1950–55

Example Sentences

See Examples For:

deep space

Scientists determined the object had entered the solar system from deep space, making it the third known object to have come from another star system.

From Los Angeles Times ● Jun. 6, 2026

Previous work led by LMU physicist Dr. Giulia Roccetti showed that giant planets ejected from their systems may still retain some of their moons after being thrown into deep space.

From Science Daily ● May 29, 2026

And unlike the superconducting loops favored by International Business Machines and Google, which must be chilled to temperatures colder than deep space, photonic interconnects can operate at room temperature.

From Barron's ● Apr. 21, 2026

Victor Glover became the first black astronaut to reach deep space; Christina Koch the first woman; Jeremy Hansen the first Canadian.

From BBC ● Apr. 16, 2026

Commander Lewis and the surviving crew, via long-range communication from Hermes, gave eulogies for their departed comrade from deep space.

From "The Martian" by Andy Weir