Historical observation repeated: occultation of the Crab Nebula by the Moon

On Saturday morning, July 18, 2020, the moon passed in front of the Crab Nebula (M1) very early. Approximately every 9 years such an occultation is visible from the Netherlands. In November 1955 this was the very first observation with the Dwingeloo Radio Telescope. Paul Boven and Hans van der Meer performed this historical observation again with the radio telescope.