Westerhout 5 (Sharpless 2-199, LBN 667, Soul Nebula) is emission nebulae in Cassiopeia. Several small open clusters are embedded in the nebula: CR 34, 632, and 634 (in the head) and IC1848 (in the body).

The cluster contains hundreds of stars, of which only a handful are commonly visible to the unaided eye.

The Crescent Nebula is a beautiful emission nebula in the constellation Cygnus, about 5000 light-years away. Also known as NGC 6888, Caldwell 27, Sharpless 105.

Other popular names in astronomy for the Hercules Globular cluster are : Messier 13 (M13) and NGC 6205. M13 was discovered by Edmond Halley in 1714, and catalogued by Charles Messier on June 1, 1764.

Amongst the various things that Pixinsight does pretty awesomely, there are hidden routines to help you annotate astronomical images.

A charge-coupled device (CCD) is a device that records the movement of electrical charge, usually from within the device to an area where the charge can be manipulated, for example conversion into a digital value.

The Lagoon Nebula (catalogued as Messier 8 or M8, and as NGC 6523) is a giant interstellar cloud in the constellation Sagittarius. It is classified as an emission nebula and as a H II region.