The Speed of a Runaway Supermassive Black Hole

In April, researchers who had been using the Hubble telescope to study a dwarf galaxy, 7.5 billion light years from us, reported that they'd found a supermassive black hole roaming interstellar space after getting ejected from its home galaxy. The speed of our galaxy relative to the cosmic microwave background is about 1.3 million miles per hour and 3.5 million mph for the runaway black hole.

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This week we're talking about our old friend, Mr. Distance-Over-Time himself: Speed! From the speediest hedgehog to the slowiest slug, we all have speed, and we can all come together and listen to this podcast to learn more about how and why that is.

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[Trivia Question]

Walter Arnold first ever speeding ticket

https://automotivehistory.org/january-28-1896-the-first-speeding-ticket-2/

https://www.historic-uk.com/HistoryUK/HistoryofBritain/Walter-Arnold-Worlds-First-Speeding-Ticket/

https://blog.britishnewspaperarchive.co.uk/2014/01/28/the-first-speeding-fine-for-travelling-at-8-mph/

[Fact Off]

The Oh-My-God particle (high-energy cosmic ray)

https://www.quantamagazine.org/the-particle-that-broke-a-cosmic-speed-limit-20150514/

https://www.science.org/content/article/oh-my-god-its-real-particle