bn:02421337n
Noun Concept
Categories: General relativity, Black holes
EN
photon sphere  photon orbit  photon ring  Photonsphere
EN
A photon sphere or photon circle is an area or region of space where gravity is so strong that photons are forced to travel in orbits, which is also sometimes called the last photon orbit. Wikipedia
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EN
A photon sphere or photon circle is an area or region of space where gravity is so strong that photons are forced to travel in orbits, which is also sometimes called the last photon orbit. Wikipedia
spherical area or region of space where gravity is strong enough that massless particles are forced to travel in orbits Wikidata
A region of around a black hole where photons travel in orbits around the singularity, just beyond the event horizon. Wiktionary
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