two merging galaxies colloided against each other in the middle of NGC 6240, powered by a black hole, million times of the mass of the sun. their cores collides into each other, ripping the stars in the galaxies, and after few million year, they will create a bigger galaxy. the picture is taken by NASA's Spitzer Space Telescope. by looking at the picture, people from NASA said if was fascinating of its uniqueness, and it was rare to get a photo like it.
http://www.astronomy.com/asy/default.aspx?c=a&id=8034
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