: relating to or existing in space outside the solar system
deep-sky objects
Examples of deep-sky in a Sentence
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Seeing both Mars and Venus do so in the same year is a vivid reminder that the planets share a common orbital neighborhood, and that some deep-sky landmarks are perfectly placed for these striking conjunctions.
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Kenna Hughes-Castleberry, Space.com, 9 Jan. 2026
One standout target to try locating is the Orion Nebula, a nearby stellar hotspot located 1,350 light-years away and one of the easiest deep-sky objects to spot without a telescope.
—Michael D'estries, Travel + Leisure, 1 Jan. 2026
Last Quarter Moon The moon reaches last quarter tonight, rising after midnight and offering 10 nights of increasingly dark evening skies — prime conditions for stargazing and deep-sky viewing.
—Jamie Carter, Forbes.com, 8 Sep. 2025
That's when amateur astronomers can get out their telescopes or binoculars to study planets, stars and other deep-sky objects.
—Janet Loehrke, USA Today, 21 Aug. 2025
With focusing down, the next hurdle was to image a deep-sky object, or DSO—star clusters, galaxies, and nebulae.
—IEEE Spectrum, 28 Apr. 2024
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Kenna Hughes-Castleberry, Space.com, 9 Jan. 2026
One standout target to try locating is the Orion Nebula, a nearby stellar hotspot located 1,350 light-years away and one of the easiest deep-sky objects to spot without a telescope.
—Michael D'estries, Travel + Leisure, 1 Jan. 2026
Last Quarter Moon The moon reaches last quarter tonight, rising after midnight and offering 10 nights of increasingly dark evening skies — prime conditions for stargazing and deep-sky viewing.
—Jamie Carter, Forbes.com, 8 Sep. 2025
That's when amateur astronomers can get out their telescopes or binoculars to study planets, stars and other deep-sky objects.
—Janet Loehrke, USA Today, 21 Aug. 2025
With focusing down, the next hurdle was to image a deep-sky object, or DSO—star clusters, galaxies, and nebulae.
—IEEE Spectrum, 28 Apr. 2024
Cite this Entry
“Deep-sky.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/deep-sky. Accessed 19 Jan. 2026.
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