Using
data from NASA's Chandra X-ray Observatory, astronomers have discovered
an unprecedented bonanza of black holes in the Andromeda Galaxy, one of
the nearest galaxies to the Milky Way.
This
composite image of a galaxy illustrates how the intense gravity of a
supermassive black hole can be tapped to generate immense power. The
image contains X-ray data from NASA's Chandra X-ray Observatory (blue),
optical light obtained with the Hubble Space Telescope (gold) and radio
waves from the NSF's Very Large Array (pink).