Cygnus OB9 is an
OB association in
Cygnus. It is near to the
Cygnus OB2 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
Cygnus X-3 is a high-mass X-ray binary ( HMXB), one of the stronger binary ...
, 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
In astronomy, the Great Rift (sometimes called the Dark Rift or less commonly the Dark River) is a dark band caused by interstellar clouds of cosmic dust that significantly obscure ( extinguish) the center and most radial sectors of the Milky ...
like
Cygnus OB2.
References
Stellar associations
Cygnus (constellation)
Star-forming regions
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