Observing Black Holes: The Quest for a Photon Ring
Theoretical physicist Alex Lupsasca is working towards capturing an image of a 'photon ring', a thin ring of light surrounding every black hole, to test Einstein's general theory of relativity.
Black holes, regions with dramatically warped spacetime, are thought to be encircled by a tendril-thin halo of light, known as a photon ring, which has the potential to reveal secrets from the black hole's edge.
- Black holes are areas where spacetime is warped so dramatically that nothing can escape.
- Particles of light, or photons, can graze the edge of the black hole without falling in.
- These photons orbit the black hole one or more times before breaking away, forming the photon ring.
A mysterious ring of light is thought to surround every black hole.
Alex Lupsasca aims to glimpse this photon ring for the first time using a space telescope.
Author's summary: Physicist Alex Lupsasca seeks to image a black hole's photon ring.
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