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Definitions

interstellar space

[in-ter-stel-er spays] / ˌɪn tərˈstɛl ər ˈspeɪs /

NOUN

deep space

Synonyms

WEAK

celestial spaces cosmic space cosmos intercosmic space intergalactic space interplanetary space metagalactic space ocean of emptiness outer space region beyond Earth's solar system the heavens the universe the void the void above

NOUN

outer space

Synonyms

STRONGEST

cosmos

WEAK

celestial spaces cosmic space deep space empty space ether space infinite space infinity intercosmic space intergalactic space interplanetary space metagalactic space ocean of emptiness pressureless space the heavens the void the void above

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“It’s quite reasonable to assume that since humanity has sent spacecraft into interstellar space, other civilizations might do the same thing,” Croft says.

From The Wall Street Journal • Apr. 23, 2026

"All types of amino acids bond into peptides through the same reaction. It is, therefore, very likely that other peptides naturally form in interstellar space as well," says Hopkinson.

From Science Daily • Jan. 21, 2026

The results help explain the many different ways planets can be knocked out of their original systems and sent drifting through interstellar space.

From Science Daily • Jan. 4, 2026

"We think there's a two-thirds chance this comet is older than the solar system, and that it's been drifting through interstellar space ever since."

From BBC • Jul. 11, 2025

By its very nature it would have produced vast quantities of radioactive debris, but for conscientious mission profiles only in the emptiness of interplanetary or interstellar space.

From "Cosmos" by Carl Sagan

interstellar space

Example Sentences

Related Words