Deep-Sky Encyclopedia · 2 entries

Featured Objects

Iconic deep-sky objects added to the encyclopedia — the Horsehead and Cone nebulae.

The Cone NebulaDeep-sky object
in Monoceros
A tall pillar of cold molecular gas and dust, about seven light-years long, sculpted by the radiation and winds of hot young stars in the NGC 2264 star-forming region in Monoceros. The Cone lies at the southern end of the same complex as the Christmas Tree Cluster, roughly 2,700 light-years away, and is a textbook example of a star-forming pillar.
The Horsehead NebulaDeep-sky object
in Orion
One of the most recognisable dark nebulae in the sky — a column of cold, dusty gas in the Orion molecular cloud, about 1,500 light-years away, shaped by radiation into the silhouette of a horse's head. Catalogued as Barnard 33, it is seen against the soft red glow of the emission nebula IC 434 behind it, in the constellation Orion just south of the belt star Alnitak.