Winifred Edgerton Merrill, Comet 12P/Pons-Brooks Sky Charts and Coordinates. Image: TheSkyLive.com.

Winifred Edgerton Merrill, Comet 12P/Pons-Brooks Sky Charts and Coordinates. Image: TheSkyLive.com.

Winifred Edgerton Merrill, Comet 12P/Pons-Brooks Sky Charts and Coordinates. Image: TheSkyLive.com.

Winifred Edgerton Merrill, Comet 12P/Pons-Brooks Sky Charts and Coordinates. Image: TheSkyLive.com.

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