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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.

The results suggest that 3I/ATLAS formed in a very different chemical environment before beginning its journey through interstellar space.

From Science Daily • Jun. 4, 2026

“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

Under these carefully controlled conditions, the team studied how particles behave when exposed to radiation, closely matching what happens in real interstellar space.

From Science Daily • Jan. 21, 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

The light by which we see it now has spent seventy-five years traversing the dark of interstellar space on its long journey to Earth.

From "Cosmos" by Carl Sagan

interstellar space

Example Sentences

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