The Carina Nebula by EddieTrimarchi on Flickr.
An expanse of hydrogen gas that originates from the brightest star near the center of the picture.
The star, Eta Carina is thought to be most likely to go supernova next, in our galaxy.
The last supernova in our galaxy was in 1604 even though the accepted estimated rate for milky way supernovae is 3 per century.
This picture is a 10-part mosaic taken with a 900mm Maksutov-Newtonian telescope and SBIG 3.2 megapixel cooled CCD camera with 6nm Hydrogen-alpha filter.
Exposures: 2 hours for each mosaic tile.
Total: 20 hours.