Dwingeloo Radio Telescope is a 25m dish in the Netherlands. At the
time of its inauguration in 1956 it was the largest radio telescope in
the world (but in 1957 this mantle was taken over by the 76m Lovell
Telescope at Jodrell Bank in the UK. The telescope,
which is owned by ASTRON, the Netherlands Institute for Radio Astronomy,
was used for many
years, together with
telescopes in Australia, to trace the structure of our Galaxy by mapping
the distribution of neutral hydrogen gas.
The telescope ceased formal operations in 2000, but the C.A. Muller Radio Astronomy Station (CMARAS) foundation
have restored the telescope to working order.