100-m Radio Telescope
The Effelsberg 100-m
Radio Telescope is a radio telescope in Bad Münstereifel,
Germany, inaugurated on 1 August 1972.
It is operated by the Max Planck Institute for Radio Astronomy
For 29 years the Effelsberg Radio Telescope was the
largest fully steerable radio telescope on Earth.
In 2000, it was surpassed by the Green Bank Telescope, US, which
has a slightly larger elliptical 100 by 110-metre aperture.
The telescope is part of the Event Horizon Telescope, and in
part made the first picture of a Supermassive black hole