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How We Solved the Mystery of Pulsating Auroras

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Astronomers have finally observed what causes pulsating auroras, and our estimates of the mass of the Andromeda Galaxy have shrunk.

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Sources:

https://www.eurekalert.org/pub_releases/2018-02/icfr-mwt021318.php
https://s3-ap-southeast-2.amazonaws.com/icrar.org/wp-content/uploads/2018/02/13131736/m31-escape-velocity.pdf

https://www.eurekalert.org/pub_releases/2018-02/uot-doa020818.php
https://www.nature.com/articles/nature25505
http://www.cbc.ca/news/technology/pulsating-aurora-the-pas-1.4534912
https://www.sciencealert.com/pulsating-aurora-northern-lights-electron-microbursts
http://www.newsweek.com/mysterious-pulsating-auroras-caused-showers-electrons-808973
https://www.nasa.gov/feature/goddard/nasa-measuring-the-pulsating-aurora

Images:

https://www.flickr.com/photos/cars10s/7191574910/
https://eol.jsc.nasa.gov/BeyondThePhotography/CrewEarthObservationsVideos/
https://www.nasa.gov/feature/goddard/nasa-measuring-the-pulsating-aurora
https://en.wikipedia.org/wiki/File:Jupiter_and_its_shrunken_Great_Red_Spot.jpg
https://en.wikipedia.org/wiki/File:Saturn_during_Equinox.jpg
https://en.wikipedia.org/wiki/File:Star_cluster_in_the_Andromeda_galaxy.jpg
https://en.wikipedia.org/wiki/File:M31_09-01-2011.jpg
https://en.wikipedia.org/wiki/File:Andromeda_galaxy_2.jpg
https://en.wikipedia.org/wiki/File:Andromeda_galaxy_Ssc2005-20a1.jpg
https://en.wikipedia.org/wiki/File:Andromeda_Galaxy_(with_h-alpha).jpg

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