A close look at a very distant and surprisingly active world, with icebergs the size of mountains, knifeblade ridges kilometres high, and a sea of nitrogen slushie.

Recommended age: 12-18 years but everyone is welcome!

The talk was streamed on Facebook Live. You can watch a recording of the talk here on our Facebook page (see the 'Astronomy at Home' video playlist) or by clicking on the video in the media gallery above.