Thank you for downloading from the BBC.

The details of our complete range of podcasts and our terms of use,

go to BBCworldservice.com slash podcasts. broadcasts. a place that humans have yet to reach.

The farthest we ventured into the universe was when we stepped onto the moon

and only one of our spacecraft has left the solar system.

There's all kinds of different types of waves propagating.

But we can listen to the universe beyond.

Far from being a silent wilderness, space is a surprisingly noisy place.

Whistles and chorus and electron cyclotron.

I'm Lucy Green and in the next half an hour on Discovery from BBC World Service,

all the sounds and music you'll hear have resulted from our exploration of space.

Some are recorded sound. Others are data like x-rays or radio waves that have been

sonified so we can listen in to parts of the universe that we can't see.

All of them have inspired scientists, musicians and artists to help us understand our universe.

Last week we took a Sonic trip through the solar system to hear the ringing of

Mercury's magnetic field. We tuned in to the Twitter of subatomic particles an hour ride through the rings of Saturn. This week we're leaving our corner of the Cosmos behind as we cross over the boundary

from the solar system into interstellar space. This is the sound that Voyager 1 has picked up very recently.

Cosmologist Andrew Ponson from University College London.

Voyager 1 is that the furthest man-made object from us, it's about 130 times further away than our son.

And that means it's essentially left the solar system.

If you think of the solar system as being the region which the sun is really in

command of, it's left that part of space. It's heading straight into what we call the

...