NGC 5128, aka Centaurus A, is a starburst galaxy in Centaurus, and the 5th brightest in our skies, so a popular astrophotography target. Its center contains a supermassive black hole which ejects a relativistic jet visible in X-ray and radio wavelengths (not visible wavelengths). 

Technical details:

SSRO imaged this galaxy with a 16″ RCOS at f/11.3 and an Apogee U9 on a Planewave 200HR mount in 2012 (SSRO/PROMPT/CTIO). LRGB with 18 hours Lum, 6.5 hours Red, 6.5 hours Green, and 10 hours Blue. Image scale 0.41″/pixel. Calibration was in Maxim, alignment/integration in PixInsight, deconvolution in PixInsight, and everything else in Photoshop.