deep space


Definition of deep space

: 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 This high-profile international effort, spearheaded by the US space agency at a cost of nearly $7.5 billion per year, seeks to return humans to the lunar surface in the mid-2020s and establish a sustainable presence in deep space. Eric Berger, Ars Technica, 20 Apr. 2022 Other comets like this ancient comet then orbit the solar system billions of miles into deep space. Joshua Hawkins, BGR, 14 Apr. 2022 After the last Apollo moon landing, in 1972, NASA spent three decades building space shuttles and the International Space Station, while relying on robots to explore Mars and deep space. Eric Killelea, San Antonio Express-News, 4 Apr. 2022 Gray said his best guess is that the booster followed the DSCVR weather satellite launched by the Falcon 9 on its million-mile journey into deep space, and is now probably in an orbit around the sun. Alex Millson, Fortune, 15 Feb. 2022 My strong suspicion is that the number of UFO sightings that involve actual alien beings, from deep space, with the tentacles and the antennae and so on, is zero. Joel Achenbach, Washington Post, 11 Aug. 2021 The goal of the mission is to give astronomers a basis for how their spacecraft, which is built for humans, will perform on a deep space exploration. Jordan Mendoza, USA TODAY, 7 Mar. 2022 And this is precisely the kind of experimental work that NASA's lunar payloads program should be supporting if the space agency is ever to find a pathway to sustainable deep space exploration. Eric Berger, Ars Technica, 21 Jan. 2022 As a textile artist, Baxter crafts intricate death shrouds topstitched with interpretations of Hubble Space Telescope images of star-birth in deep space. Los Angeles Times, 5 Mar. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'deep space.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of deep space

circa 1952, in the meaning defined above

Learn More About deep space

Time Traveler for deep space

Time Traveler

The first known use of deep space was circa 1952

See more words from the same year

Dictionary Entries Near deep space

Deep South

deep space

deep state

See More Nearby Entries 

Statistics for deep space

Last Updated

27 Apr 2022

Cite this Entry

“Deep space.” Dictionary, Merriam-Webster, Accessed 26 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

Great Words for Scrabble

  • scrabble tiles that read scrabble quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!