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
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During the mission, four astronauts — three Americans and one Canadian — will spend about 10 days in deep space to confirm that all the spacecraft's systems operate as designed with the crew aboard.
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Jonathan Limehouse, USA Today, 29 Mar. 2026
Replacing solar with nuclear has two advantages in deep space.
—Keith Cooper, Space.com, 27 Mar. 2026
By trapping radiation from the Sun and from deep space, our planet’s magnetic field is part of what makes Earth habitable for us and other life forms.
—Scott Solomon, The Conversation, 27 Mar. 2026
Radiation sensors on the crew and inside Orion will study the impact of radiation in deep space.
—Matthew Glasser, ABC News, 26 Mar. 2026
See All Example Sentences for deep space
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Jonathan Limehouse, USA Today, 29 Mar. 2026
Replacing solar with nuclear has two advantages in deep space.
—Keith Cooper, Space.com, 27 Mar. 2026
By trapping radiation from the Sun and from deep space, our planet’s magnetic field is part of what makes Earth habitable for us and other life forms.
—Scott Solomon, The Conversation, 27 Mar. 2026
Radiation sensors on the crew and inside Orion will study the impact of radiation in deep space.
—Matthew Glasser, ABC News, 26 Mar. 2026
See All Example Sentences for deep space
Cite this Entry
“Deep space.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/deep%20space. Accessed 1 Apr. 2026.
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