

Event Horizon Telescope reveals why M87’s black hole ring is not a perfect circle
The galaxy M87, located about 55 million light-years from Earth, hosts at its core the supermassive black hole M87*, whose image whose image went viral around the globe in 2019 thanks to the Event Horizon Telescope (EHT). That historic photograph revealed a luminous ring around M87* with a slightly elongated shape that raised many questions: why is it not perfectly circular? Today, the journal Astronomy & Astrophysics (A&A) publishes a study co-led by the Instituto de Astrofísica de Andalucía (IAA-CSIC) that sheds light on the issue.
10/07/2025Read more