Capturing the photon ring of a black hole - YouTube
Alexandru Lupsasca: The Black Hole Photon Ring - YouTube
Event Horizon Telescope, by Jean-Pierre Luminet
There Are Infinite Rings of Light Around Black Holes. Here's How We Could See Them : ScienceAlert
Phys. Rev. D 101, 084020 (2020) - Universal polarimetric signatures of the black hole photon ring
The photon ring around the black hole M87 is noticed*
The photon ring: A black hole ready for its close-up
A space telescope could reveal a black hole's photon ring
A 'Fuzzy' First Image of a Black Hole: What the Photo Actually Shows
M87 Black hole. Why can we see the blackness? - Astronomy Stack Exchange
Universal interferometric signatures of a black hole's photon ring | Science Advances
Astronomers Discover Way to Get Sharp Images of Black Hole's Photon Rings | Sci.News
There Are Infinite Rings of Light Around Black Holes. Here's How We Could See Them : ScienceAlert
Photon ring structure of rotating regular black holes and no-horizon spacetimes | Request PDF
Photon ring structure of rotating regular black holes and no-horizon spacetimes | Request PDF
The photon ring: a black hole ready for its close-up
Photon ring structure of rotating regular black holes and no-horizon spacetimes | Request PDF
Physicists dispute a claim of detecting a black hole's 'photon ring'
A Space Telescope Could Reveal a Black Hole's Photon Ring - Universe Today
A Space Telescope Could Reveal a Black Hole's Photon Ring - Universe Today
A possible technique to observe photon rings around a black hole
arXiv:1906.00873v2 [astro-ph.HE] 17 Jun 2019
M87 Black hole. Why can we see the blackness? - Astronomy Stack Exchange
The photon ring around the black hole M87 is noticed*
