185: Disconnection Event

Angus Hervey, Amy Rose
/ 13 min read

Plus, planetary defence systems, Roger Federer, The Queue, autonomous driving, and good news on US cancer deaths, gay marriage in Cuba, mammal recoveries in Europe, coal closures in Australia, and EV sales in Germany.

185: Disconnection Event
This is a real photo of Comet C/2021 A1, known as Comet Leonard, and the winner of the 2022 Astronomy Photographer of the Year. Taken by Gerald Rhemann on Christmas Day 2021, it shows a dramatic moment in the life of a comet known as a disconnection event, when a piece of the comet's tail becomes separated after being hit by high velocity solar particles.

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