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Science
FRONTIERS
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Wednesday 21:00-21:30
Frontiers explores new ideas in science, meeting the researchers who see the world through fresh eyes and challenge existing theories - as well as hearing from their critics. Many such developments create new ethical and moral questions and Frontiers is not afraid to consider these.
radioscience@bbc.co.uk
LISTEN AGAINListen 30 min
Listen to 19 November
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Wednesday 19 November  2003
Hubble space telescope image of colliding spiral galaxies
Image courtesy of NASA / STScI

If you’re lucky enough to be out on a clear and very dark night, miles away from any city and look up, you’re greeted by one of space’s most awesome sights.

A long band of apparent haze, spanning like a winding stream from one corner of your view to another: our Milky Way.

It’s one of many galaxies littering the cosmos - one of many collections of stars that form the building blocks of the universe.

In Frontiers Peter Evans explores one of the greatest challenges facing astronomers today - how do galaxies form? Why aren’t the stars wandering around the universe by themselves?

Peter Evans will be hearing that astronomers are now piecing together the story of the formation of our Milky Way. New telescopic technology that peers into the far reaches of the universe is revealing that galaxies are the result of dramatic collisions and cannibalistic activity.

It’s the biggest most dynamic drama in space – and fuels new insight into the fate of our own galaxy – and of planet earth.

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