Karl Jansky with his Milky Way Map

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Karl Jansky with his Milky Way Map

Karl Jansky and his map of the Milky Way

Karl Guthe Jansky joined the staff of the Bell Telephone Laboratories in Holmdel, New Jersey in 1928. While hunting for radio static for Bell Labs, Jansky made the surprise discovery of radio waves coming from the center of our Milky Way Galaxy. In this photo, he is standing under a rough map of the night sky and pointing to the constellation of Cassiopeia. The wavy lines track the radio emissions he discovered on the chart paper, which also line up with the disk of our Galaxy, the Milky Way.

Credit: NRAO/AUI/NSF

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