BONUS - More Comets, Less Asteroids

Is there a Cosmological Horizon? Can we change a comet's orbit to see more of them? What's the most distant human-made object in space? Izzie, Dr Becky and Robert dive into The Supermassive Mailbox to answer your questions. 

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The Supermassive Podcast is a Boffin Media Production by Izzie Clarke and Richard Hollingham.