Greg Brown, astronomer from the Royal Observatory Greenwich chats to Dan about what life might be like on other Earth-like planets and how long it might take for our Mission Transmission message to reach them.

Greg Brown, astronomer from the Royal Observatory Greenwich chats to Dan&nbsp;about what life might be like on other Earth-like planets and how long it might take for our Mission Transmission message to reach them.

We're the UK's children's radio station. Listen across the UK on DAB Digital Radio, on mobile and online at funkidslive.com.

We're the UK's children's radio station. Listen across the UK on DAB Digital Radio, on mobile and online at funkidslive.com.

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