NGC 4631 is a big beautiful spiral galaxy seen edge-on only 25 million light-years away towards the small northern constellation Canes Venatici. This galaxy's slightly distorted wedge shape suggests to some a cosmic herring and to others the popular moniker of The Whale Galaxy. Either way, it is similar in size to our own Milky Way. A companion galaxy, the small elliptical NGC 4627 appears above the Whale Galaxy. (Source: APOD). This is 2 hours of exposure on June 5, 2013. Click on the image for a more detailed view.