Jupiter Juno mission: Five facts you need to know

A Nasa spacecraft is about to arrive at the largest planet in the solar system - Jupiter.

The probe launched five years ago and has travelled nearly three billion kilometres to reach its destination.

Entering into orbit will be fraught with dangers - but if the spacecraft succeeds, it will give us our best understanding to date of this giant, mysterious world.

BBC science correspondent Rebecca Morelle tells us the top five things you need to know about this mission.