• Cecilia Payne-Gaposhkin in the news

    From Michael Dworetsky@21:1/5 to All on Fri May 14 09:39:00 2021
    Two giant tunnelling machines are starting work on a 10-mile tunnel
    under the Chiltern Hills in England for the new High-Speed 2 rail line
    from London to Birmingham, Manchester, and Leeds.

    The machines are named "Florence" for nurse Florence Nightingale and
    "Cecilia" for Cecilia Payne-Gaposhkin, pioneering astronomer. Each
    machine is 170m long and as they cut away at the rock (chalk) the spoil
    is removed by conveyor and sections of concrete wall are inserted behind
    the cutting face. They can dig about 15m per day and the job will take
    three years. I understand that the concrete wall segments are being
    formed on the machine and transported forward to the newly cut rock face
    where they are fitted together.

    Cecilia Payne was born in Britain and was the first astronomer to show
    that stars were more or less all of the same composition, mainly
    Hydrogen and Helium and a few percent metals, with the differences in
    spectra caused by their effective temperatures and not their compositions.

    Mike Dworetsky

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