European Southern Observatory (ESO) | Size equivalent of the shadow of Sagittarius A* @ESOobservatory | Uploaded 2 years ago | Updated 1 hour ago
From the Event Horizon Telescope (EHT) Collaboration image of the black hole at the centre of our galaxy (Sgr A*), researchers can measure the size of its shadow to be about 52 micro-arcseconds on the sky. This is about the size of a donut on the Moon as seen from Earth.

This video can be downloaded (various formats available including Ultra HD) on: http://www.eso.org/public/videos/eso2208-eht-mwg

Credit:
ESO/M. Kornmesser/L. Calçada