interstellar
adjective
in·ter·stel·lar
ˌin-tər-ˈste-lər 
: located, taking place, or traveling among the stars especially of the Milky Way galaxy
Examples of interstellar in a Sentence
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Scientists have discovered the largest organic molecule containing sulfur — a key ingredient for life — ever identified in interstellar space.
—
Jacopo Prisco, CNN Money, 30 Jan. 2026
Cosmic ray detectors hunt rare antideuterons as dark matter annihilation signatures—but galactic cosmic rays smashing into interstellar gas also produce them, creating background noise.
—Tejasri Gururaj, Interesting Engineering, 29 Jan. 2026
Future space missions that sample comets, asteroids, or even interstellar dust may be able to test this idea directly by looking not just for individual amino acids but also for short peptides like those produced in these experiments.
—William A. Haseltine, Forbes.com, 28 Jan. 2026
The results reveal a previously unknown pathway for building protein precursors that does not require liquid water—long thought to be essential—that can operate in the extreme conditions of interstellar space.
—Victoria Corless, Space.com, 28 Jan. 2026
See All Example Sentences for interstellar
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Jacopo Prisco, CNN Money, 30 Jan. 2026
Cosmic ray detectors hunt rare antideuterons as dark matter annihilation signatures—but galactic cosmic rays smashing into interstellar gas also produce them, creating background noise.
—Tejasri Gururaj, Interesting Engineering, 29 Jan. 2026
Future space missions that sample comets, asteroids, or even interstellar dust may be able to test this idea directly by looking not just for individual amino acids but also for short peptides like those produced in these experiments.
—William A. Haseltine, Forbes.com, 28 Jan. 2026
The results reveal a previously unknown pathway for building protein precursors that does not require liquid water—long thought to be essential—that can operate in the extreme conditions of interstellar space.
—Victoria Corless, Space.com, 28 Jan. 2026
See All Example Sentences for interstellar
Cite this Entry
“Interstellar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/interstellar. Accessed 14 Feb. 2026.
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interstellar
adjective
in·ter·stel·lar
ˌint-ər-ˈstel-ər
: located or taking place among the stars
interstellar space
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