The gas is expanding because it is being heated by powerful particle "jets" being released by the black hole.More info at BBC News.
The observations were made by the Very Large Telescope in Chile and Nasa's Chandra space observatory.
Astronomers have unveiled the findings in the latest edition of Nature journal.
"We have been astonished by how much energy is injected into the gas by the black hole," says lead author Manfred Pakull, from the University of Strasbourg, France.
Black hole emits gas bubble 1,000 light-years across
Posted on Friday, July 09 2010 @ 0:51 CEST by Thomas De Maesschalck