description Sh2-225 Overview
Sh2-225 is an emission nebula and H II region in the constellation Auriga. It lies in the Milky Way's Perseus Arm and is catalogued in the Sharpless list of H II regions. The region is associated with ionized hydrogen and an embedded infrared source, making it a subject of observations of massive-star formation; one proposed ionizing star is the O-type star LSV+4046. Because it is faint and compact in optical images, it is primarily of interest to astronomers and astrophotographers.
help Sh2-225 FAQ
What kind of object is Sh2-225?
Sh2-225 is an emission nebula and H II region in the constellation Auriga. It is part of the Milky Way and is listed in the Sharpless catalogue of H II regions.
What does H II region mean in Sh2-225?
An H II region is a cloud of hydrogen gas whose atoms have been ionized by energetic radiation, usually from nearby hot stars. That ionized gas produces the nebula’s characteristic emission.
Where is Sh2-225 located in the Milky Way?
Sh2-225 lies in the Milky Way’s Perseus Arm. Its location places it within one of the Galaxy’s major spiral-arm structures.
Why do astronomers study Sh2-225?
The region is associated with ionized hydrogen and an embedded infrared source. Those features make it useful for studying star-forming environments and objects hidden by surrounding dust.
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