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

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

The four astronauts took thousands of photographs throughout their journey, amassing a stunning portfolio of images from deep space.

From Barron's • Apr. 10, 2026

Instead of burning fuel, Munday and graduate student researcher Tristan Deppe explored whether the cold side could be linked to something far colder and much more distant: deep space.

From Science Daily • Feb. 27, 2026

Colonists died—and in deep space, death meant death, just as completely as if they had been gleaned.

From "Scythe" by Neal Shusterman