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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Future missions taking shape at Goddard include spacecraft to explore Venus and Saturn’s moon Titan, and a new telescope to search for planets that might hold life in deep space.
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Brittany Allen, Literary Hub, 13 Feb. 2026
The company is positioning the system for deep space science missions, lunar surface operations, and high-value defence satellites, aiming to offer a lighter and more fuel-efficient alternative to decades-old RTG technology.
—Neetika Walter, Interesting Engineering, 11 Feb. 2026
Blue Origin, the space exploration company founded by Jeff Bezos, also holds a multibillion NASA contract to develop a vehicle capable of ferrying astronauts from deep space to the lunar surface.
—Jackie Wattles, CNN Money, 9 Feb. 2026
But the arduous effort may be essential for achieving longer stays in deep space—as well as building the lunar space station and surface outposts envisioned for future Artemis missions.
—K. R. Callaway, Scientific American, 5 Feb. 2026
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Brittany Allen, Literary Hub, 13 Feb. 2026
The company is positioning the system for deep space science missions, lunar surface operations, and high-value defence satellites, aiming to offer a lighter and more fuel-efficient alternative to decades-old RTG technology.
—Neetika Walter, Interesting Engineering, 11 Feb. 2026
Blue Origin, the space exploration company founded by Jeff Bezos, also holds a multibillion NASA contract to develop a vehicle capable of ferrying astronauts from deep space to the lunar surface.
—Jackie Wattles, CNN Money, 9 Feb. 2026
But the arduous effort may be essential for achieving longer stays in deep space—as well as building the lunar space station and surface outposts envisioned for future Artemis missions.
—K. R. Callaway, Scientific American, 5 Feb. 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 15 Feb. 2026.
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