| This photo, taken at CSIRO's Parkes
Observatory circa 1965, shows scientists take their colouring in seriously.
In the photo, astronomer Jan Högbom and assistants carefully colour in an
early survey of the Galactic Plane. According to Jan (inventor of the
CLEAN
algorithm and co-author of the classic publication,
Radiotelescopes), he
used to cut out measured profiles in white paper and photograph them one
after the other behind a glass rod, making intensity strips that combined
together to form an early radiograph.
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