Location: Observatorio de Calar Alto. Camera: CAHA LAICA camera 16-megapixel CCD. Telescope: Zeiss 3.5-meter f3.3. Filters: Johnson BVR. Exposure time: 2.5 hours. Entirely processed in PixInsight. High resolution image (JPEG 3940×3934 pixels, 7.6 MB) NGC 7331. ©2008 Vicent Peris (OAUV), Gilles Bergond (CAHA), CAHA, OAUV.

NGC 7331 is a galaxy in the Pegasus constellation located 40 million light-years away from Earth. Its size and shape are very similar to the galaxy we live in.

The four galaxies at leftare NGC 7335, 7336, 7337 and 7340. Though they are significantly smaller in the image, they are as big as NGC 7331 but located 500 million light-years away.

Links to related material:

The image at PixInsight Gallery.
NGC 7331 processing example on PixInsight website.
NGC 7331 on Wikipedia.