
Images
M110
M110 is at first glance a somewhat boring galaxy, always in the shadow of its close and popular neighbour M31, the Andromeda Galaxy. The main reason of imaging was to complete the Messier catalogue. But some very small scale structure appeared to be present, which in the end made this a fun object to photograph.
M57
M57, or the Ring Nebula, is a small planetary nebula in the constellation Lyra. Usually, only the core is captured in images, but this photo also shows the outer hydrogen (Ha) and oxygen (OIII) gas clouds. The difference is significant, so two different HDR methods were needed to achieve this result.
M77 | Arp37
M77 is a nice small galaxy in the constellation Cetus. It has a wide area of gaseous rings around it, most of which could be pulled out in this image, due to 20h of exposure. M77 is also listed in the Arp Catalogue, as Arp37.
M16 | Sh2-49
M16 is also known as the Eagle Nebula, but the central part of this nebula is made even more popular by the Hubble Telescope, and is nick-named the pillars of creation. Here in a narrowband version with a total of almost 40h of exposure.
M4
M4 is a globular cluster in the constellation Scorpius. It is located at a distance of 50,000 light years from Earth. During processing some interesting green stars stood out which appear to be RR Lyrae variable stars, often found in clusters. The intense green colour is an artefact of the way broadband images like these are taken.
M82 | Arp337
M82 is often photographed together with its close neighbour M81. But the cigar galaxy as it is also called, is a beautiful example of a starburst galaxy and deserves the attention on its own.