Hosted by Steve Nerlich.

Dear Cheap Astronomy – What is the right message to send to the aliens?

Keen listeners may be familiar with Cheap Astronomy's ongoing despair at Earth's lacklustre

attempts at communication with the wider Universe. A few episodes back we ran through a

history of deliberate communications to date, about 90 per cent of which have been music – well

mostly digitized and some analog radio transmissions of music.

Dear Cheap Astronomy – Can we drill through the ice and find life on Europa?

Firstly, there are quite a few moons out there with suspected subsurface oceans – Ganymede

and Calisto around Jupiter, Enceladus and Dione around Saturn – there's even a suspicion that

Ceres, an asteroid rather than a moon, may have one.

Everyone gets excited about Europa, because it's hot.

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