interplanetary
adjective
in·ter·plan·e·tary
ˌin-tər-ˈpla-nə-ˌter-ē 
: existing, carried on, or operating between planets
interplanetary dust
an interplanetary flight
interplanetary spacecraft
Examples of interplanetary in a Sentence
Recent Examples on the Web
The company would also deal with the problem of sealing the sample return capsule and making sure that it is decontaminated in accordance with NASA and international safety protocols against interplanetary contamination.
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New Atlas, 6 July 2025
This is one of the reasons why the timeline and cost of NASA’s rockets and spacecraft and interplanetary missions have ballooned.
—ArsTechnica, 29 June 2025
In another offering, the company facilitates the transportation of memorial capsules to interplanetary space well beyond the moon.
—Eric Lagatta, USA Today, 27 June 2025
For our current rocketry, these speeds are so low and the interplanetary distances so great that even the fastest, most direct voyages take years (or even decades for destinations in the outer solar system).
—Phil Plait, Scientific American, 19 June 2025
See All Example Sentences for interplanetary
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New Atlas, 6 July 2025
This is one of the reasons why the timeline and cost of NASA’s rockets and spacecraft and interplanetary missions have ballooned.
—ArsTechnica, 29 June 2025
In another offering, the company facilitates the transportation of memorial capsules to interplanetary space well beyond the moon.
—Eric Lagatta, USA Today, 27 June 2025
For our current rocketry, these speeds are so low and the interplanetary distances so great that even the fastest, most direct voyages take years (or even decades for destinations in the outer solar system).
—Phil Plait, Scientific American, 19 June 2025
See All Example Sentences for interplanetary
Cite this Entry
“Interplanetary.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/interplanetary. Accessed 18 Jul. 2025.
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