M46 (below center left) and M47 (upper center right) are two bright clusters in the constellation of Puppis. They are relative separated by a bit more than one degree. Both clusters where independently discovered by Charles Messier after its first edition of his 45 object list.
M46 is a very rich cluster and it also contains planetary nebula NGC 2438 which can be seen in the image as a small green disk. The nebula is not part of M46; it position is seen only in perspective. M47 is also brighter than his companion, however the main bright stars are not part of the cluster. Both objects can be well seen through binoculars o low power telescopes.
At the right of M47 we have NGC 2423 with a magnitude of 6.7 and an apparent diameter of 12 arc minutes. Below left from M 47 is visible NGC 2425 with only 4 arc minutes.