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单词 observable universe
释义

Definition of observable universe in English:

observable universe

noun
Astronomy

  • The part of the entire universe that is (in principle) visible to an observer at a given time and place, i.e. that lies within the observer's particle horizon.

Origin

1930s; earliest use found in Science.

Definition of observable universe in US English:

observable universe

noun
Astronomy

  • The part of the entire universe that is (in principle) visible to an observer at a given time and place, i.e. that lies within the observer's particle horizon.

Origin

1930s; earliest use found in Science.
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更新时间：2025/4/22 20:13:27