Topic: NGC 7793: Black Hole Blows Big Bubble

[sam]

This composite image shows a powerful microquasar containing a black hole in the outskirts of the nearby (12.7 million light years) galaxy NGC 7793. The large image contains data from the Chandra X-ray Observatory in red, green and blue, optical data from the Very Large Telescope in light blue, and optical emission by hydrogen ("H-alpha") from the CTIO 1.5-m telescope in gold.

http://chandra.harvard.edu/photo/2010/ngc7793/

[Clive]

Nice pictures Sam.  Microquasars are fascinating and enigmatic objects and we actually have one in the northern hemisphere which is visible at this time of year.