Williamina Fleming, Astronomer
Dr Susie Mitchell tells the story of how a young emigrant from Dundee was forced to find work in Boston as a housekeeper, but went on to become one of the most important astronomers of the time.
Photograph reproduced by permission of the National Library of Scotland.
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Decoding the night sky
This is an example of the type of聽photograph Williamina Fleming and her team spent their days examining.
It's a spectrum photograph of an area of the night sky, taken through a telescope. Because it's a negative,聽the dark sky appears聽white,聽and each dark line聽is the light from a聽star.聽It was photographed through a prism so that聽the white light from each star is聽spread out into a stripe.
In colour, each stripe would be a聽look like a聽small rainbow, but since there was only had black and white聽photography in聽those days,聽the stripes聽look more like barcodes, with tiny areas of darker and lighter shades of grey.
It must have been聽eye-straining work examining these lines, but the Harvard women became highly expert at it and were able to聽discover lots of聽information about the stars from pictures like this.
Broadcasts
- Thu 12 Mar 2015 03:40School Radio
- Wed 29 Nov 2017 03:40School Radio
