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Definitions

deep space

NOUN
outer space
Synonyms
WEAK
celestial spaces cosmic space cosmos intercosmic space intergalactic space interplanetary space interstellar space metagalactic space ocean of emptiness outer space region beyond Earth's solar system the heavens the universe the void the void above

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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

After a powerful liftoff Wednesday, Artemis II’s journey to the moon has been about as mundane as a deep space mission can get.

From Los Angeles Times • Apr. 6, 2026

"We continue to learn all about our spacecraft as we operate it in deep space with crew for the first time," Hawkins said.

From Barron's • Apr. 3, 2026

Although this capability has not yet been demonstrated, future tests are expected to explore it, potentially opening new possibilities for deep space travel.

From Science Daily • Apr. 3, 2026

Everyone now began to imagine looking at the Earth from deep space.

From "The Invention of Science" by David Wootton