Cygnus OB9 is an
OB association
The Ob (; ) is a major river in Russia. It is in western Siberia, and with its tributary the Irtysh forms the world's seventh-longest river system, at . The Ob forms at the confluence of the Biya and Katun which have their origins in the Al ...
in
Cygnus. It is near to the
Cygnus OB2
Cygnus OB2 is an OB association that is home to some of the most massive and most luminous stars known, including suspected Luminous blue variable Cyg OB2 #12. It also includes one of the largest known stars, NML Cygni. The region is emb ...
association. The region is embedded within a wider one of star formation known as
Cygnus X Cygnus X may refer to:
* Cygnus-X (star complex), a giant star formation region
* Cygnus X (music group)
See also
* Cygnus X-1 (disambiguation)
* Cygnus X-3
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, which is one of the most luminous objects in the sky at radio wavelengths. The region is approximately 5000 light years from Earth in the
constellation of Cygnus.
Although Cygnus OB9 has many O and B type stars, Cygnus OB9 is also hidden behind a massive dust cloud known as the
Cygnus Rift like
Cygnus OB2
Cygnus OB2 is an OB association that is home to some of the most massive and most luminous stars known, including suspected Luminous blue variable Cyg OB2 #12. It also includes one of the largest known stars, NML Cygni. The region is emb ...
.
See also
*
List of most massive stars
This is a list of the most massive stars that have been discovered, in solar mass units ().
Uncertainties and caveats
Most of the masses listed below are contested and, being the subject of current research, remain under review and subject to con ...
References
Stellar associations
Cygnus (constellation)
Star-forming regions
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