The Crab Nebula, M1 or NGC 1952 is a supernova remnant and pulsar wind nebula in the constellation of Taurus.
The Trapezium Cluster is a young open star cluster located in the centre of the Orion Nebula (M42).
The Rosette Nebula, also known as Caldwell 49, is a large, spherical, H II region located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy.
The Veil Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus. It constitutes the visible portions of the Cygnus Loop (radio source W78, or Sharpless 103), a large but relatively faint supernova remnant.
NGC 2264 is the designation number of the New General Catalogue that identifies two astronomical objects as a single object:
- the Cone Nebula,
- the Christmas Tree Cluster,
All of the objects are located in the Monoceros constellation.