This image is a 1 billion pixel RVB mosaic of the galactic center region (340 millions pixels in each R,V and B color). It shows the region spanning from Sagittarius (with the Milky Way center and M8/M20 area on the left) to Scorpius (with colorful Antares and Rho Ophiuchus region on the right) and cat paw nebula (red nebula at the bottom). This mosaic was assembled from 52 different sky fields made from 1200 individual images and 200 hours total exposure time, final image size is 24000x14000 pixels. The images were taken with a SBIG STL camera + Takahashi FSQ106Ed f/3.6 telescope and NJP160 mount from the clear skies of ESO Paranal Observatory in Chile. This mosaic is one of the three parts of the ESO Gigagalaxy Zoom project together with this incredible whole sky mosaic image by ESO/S.Brunier and this fantastic ESO mosaic image of the Lagoon nebula region.
Via Dr. Stefan Gruenwald