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Images of Cygnus X-1 From NASA Archives

Cygnus X-1 and HDE 226868

The above image was taken by the optical Schmidt telescope at the Palomar Observatory and shows the area of sky occupied by the black hole Cygnus X-1 and its companion HDE 226868. Distant background stars show up as isolated bright (yellow or white) pixels.

Cygnus X-1

The difference in intensity seen in these pixels is due to fluctuations in the background.

Quiz m3

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