<i>Sky & Telescope</i> December 2021 Magazine

Sky & Telescope December 2021 Magazine

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In the December 2021 issue of Sky & Telescope, we’re discussing the life and accomplishments of the woman who set the stage for modern astronomical research - Henrietta Swan Leavitt. We follow her story from the events that led to her career at Harvard College Observatory and her discovery of the correlation between the period and luminosity of Cepheid variable stars that made it possible to calculate their distance from Earth. We’re also taking a look at a different kind of star: magnetars. We cover the hunt for these unusual neutron stars, which have extreme magnetic fields and produce gamma-ray flares. Then, astronomers are keeping an eye on the sky and on their phone notifications in hopes of catching a gravitational-wave merger. Plus, we’re looking out for the little guys this issue — little telescopes, that is — with a tour through the winter sky tailored specifically for scopes with focal lengths of about 480 mm to 700 mm.