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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While physicists are hunting for dark matter in the laboratory, astronomers have their own strategies for looking for evidence of dark matter in deep space. Dan Falk, Smithsonian Magazine, 25 Oct. 2024 For what Spirit and Opportunity proved is that there’s little of value that humans can do in deep space that robots can’t do as well, or better. Michael Hiltzik, Los Angeles Times, 16 Oct. 2024 But for future missions to deep space, astronauts will stray far from Earth’s protection and will need to rely on a well-shielded spacecraft and protective spacesuits. Ashley Strickland, CNN, 19 Sep. 2024 Quickly reusing rocket parts is considered essential to SpaceX’s goal of drastically reducing the time and cost of getting cargo — or ships of people — to Earth’s orbit and deep space. Jackie Wattles, CNN, 13 Oct. 2024 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

Dictionary Entries Near deep space

Cite this Entry

“Deep space.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/deep%20space. Accessed 14 Nov. 2024.

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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