What is the furthest distance away we’ve ever observed? Why hasn't Venus lost its atmosphere from solar winds? Is Mercury a Ploonet? And how stable is the moon's orbit? It's another bonus episode with Izzie Clarke, Dr Becky Smethurst and Dr Robert Massey.

See Micheal Brill's brilliant photos from Antarctica here.

Read listener Andrew Street's article of Cassini's final moments:

Tracing Cassini's fiery death was like seeing a heart monitor flatline

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The Supermassive Podcast is a Boffin Media production for the Royal Astronomical Society. The producers are Izzie Clarke and Richard Hollingham.

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45: BONUS - Have you heard of "Ploonets"?

Tracing Cassini's fiery death was like seeing a heart monitor flatline