deep space

noun

: space well outside the earth's atmosphere and especially that part lying beyond the earth-moon system

Examples of deep space in a Sentence

Recent Examples on the Web
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And if companies like K2 are successful in lowering the cost of satellite buses, the combination of lower-cost launch and planetary missions would allow NASA to do more with less in deep space. ArsTechnica, 27 Mar. 2025 Translating current biomedical therapies for long duration, deep space missions NASA. Jake Parks, Discover Magazine, 1 Mar. 2025 Other long-term projects with less clear returns on investment, like deep space probes, might also get short shrift. Mack Degeurin, Popular Science, 27 Feb. 2025 About 45 minutes after the launch, Odin will separate and begin its solo journey into deep space, while the moon missions — the Athena lander from Intuitive Machines and NASA’s Lunar Trailblazer — take off on their own separate journeys. Jonathan O’Callaghan, New York Times, 23 Feb. 2025 See All Example Sentences for deep space

Word History

First Known Use

1865, in the meaning defined above

Time Traveler
The first known use of deep space was in 1865

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Cite this Entry

“Deep space.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/deep%20space. Accessed 11 Apr. 2025.

Kids Definition

deep space

noun
: space outside the earth's atmosphere and especially that part lying beyond the earth-moon system
Last Updated: - Updated example sentences
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