Locomotoring

Monoceros (unicorn in Greek) was named in early 1600s and is therefore, referred to as a young constellation. For us, northerners, it is a winter sky constellation. It is about 100 light years across and 5200 light years away from us. On the galactic scale, it is close, it is in the Orion spur of the Milky Way (link) close to sun. In NASA image of the rosette nebula, I notice the blue (oxygen) and the yellow (red/sulphur and green/hydrogen).

Rosette nebula in this image is photographed in the second half of January from our courtyard, with integration of approximately 100 minutes.