This is a composite image of the galaxy known as M81, built from data in four bands, (quoting from the APOD page)
X-ray data (blue) from the Chandra Observatory, infrared data (pink) from the Spitzer Space Telescope, and an ultraviolet image (purple) from the GALEX satellite, with a visible light (green) Hubble image.
The inset is X-ray band data showing some detail on black holes in the central structure of the galax, located about 12 million light years away, which has been featured here before.
It is an APOD image and all the usual stuff applies.
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