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  • Written by The Conversation
imageSupermassive black holes, containing as much mass as millions or billions of suns, exist at the centre of all galaxies, including our own Milky Way.NASA Goddard Space Flight Center, CC BY-SA

Black holes are incredibly strange phenomena: a collapsed star packed into a tiny region of space. Their gravitational force is so strong that not even light can escape.

So it is not surprising that, for a long time, black holes were not thought to actually exist – they were only a theoretical possibility.

But today, not only do we realise that black holes are relatively common in the universe, we also know that there are black holes lurking in the centre of all galaxies – including our own Milky Way Galaxy.

These black holes, called supermassive black holes, can pack the mass of millions or billions of suns into a region smaller than our solar system.

Tanya Hill spoke to Meg Urry, Professor of Physics and Astronomy at Yale University and currently the President of the American Astronomical Society, about distant galaxies and the supermassive black holes that can be found in their centre.

This podcast includes excerpts from Museum Victoria’s Black Holes: Journey into the Unknown, narrated by Geoffrey Rush.


Subscribe to The Conversation’s Speaking With podcasts on iTunes, or follow on Tunein Radio.

Music: Free Music Archive/Kai Engel - The Scope

Additional audio: Museum Victoria, Fox News (US), BBC Worldwide, Sky News (Australia)

Tanya Hill does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond the academic appointment above.

Authors: The Conversation

Read more http://theconversation.com/speaking-with-meg-urry-on-supermassive-black-holes-48375

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