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

The chip could also help deep space missions process, store, and transmit massive amounts of scientific data back to Earth more efficiently.

From Science Daily • May 15, 2026

"Goonhilly has spent years building a world class deep space communications capability," said Kenn Herskind from Goonhilly.

From BBC • May 15, 2026

Artemis III will stick in near-Earth orbit — closer to where the International Space Station sits as opposed to traveling into deep space like Artemis II.

From Los Angeles Times • Apr. 12, 2026

Unlike earlier missions, Artemis is designed with longer-term goals in mind, including future crewed landings and the development of infrastructure that could support deep space exploration.

From Salon • Apr. 11, 2026

They made a formal recommendation that we organize an international cooperative program, with new and immense radio telescopes, to probe the reaches of deep space for electromagnetic signals making sense.

From "The Lives of a Cell" by Lewis Thomas