# last photon orbit

> English word · Noun

## Definitions
1. Synonym of photon sphere.

## Etymology
From being the closest tangential approach to a black hole, where a photon's path does not eventually fall through the event horizon.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/last-photon-orbit