Comoving and proper distances

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

In standard cosmology, comoving distance and proper distance (or physical distance) are two closely related distance measures used by cosmologists to define distances between objects.

Excerpt from the Wikipedia article “Comoving and proper distances”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: NASA / WMAP Science Team, Public domain, via Wikimedia Commons.