History: Monoceros, or the Unicorn, is a modern constellation, first described by Petrus Plancius, a Dutch astronomer, in 1613. Because it is a new constellation, there is no classical mythology associated with it.
Other Interesting Sights: The Rosetta Nebula is within this constellation. This particular nebula is a cloud of hydrogen ions being heated and lit by the young bright stars in the open cluster behind it. This nebula is actually separated into several areas, designated NGC2237-9, 46. The open cluster in the center of the nebula is NGC2244.
The Rosetta Nebula,
NGC2237-9, 46
At center, open
cluster NGC2244