Sh 2-9, also known as
Gum 65, is combination
emission
Emission may refer to:
Chemical products
* Emission of air pollutants, notably:
**Flue gas, gas exiting to the atmosphere via a flue
** Exhaust gas, flue gas generated by fuel combustion
** Emission of greenhouse gases, which absorb and emit radi ...
and
reflection nebula Reflection or reflexion may refer to:
Science and technology
* Reflection (physics), a common wave phenomenon
** Specular reflection, reflection from a smooth surface
*** Mirror image, a reflection in a mirror or in water
** Signal reflection, in s ...
in the
Scorpius constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The origins of the e ...
, surrounding the
multiple star system
A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction. A large group of stars bound by gravitation is generally called a '' star cluster'' or '' galaxy'', although, broadly speaki ...
Sigma Scorpii. Sigma Scorpii is 1° to the northwest of
Messier 4,
and the nebula can be easily seen with small telescopes.
Sharpless 9 is a red emission nebula that surrounds the star Sigma Scorpii.
It is thought the star Sigma Scorpii, a variable giant star, is ionizing this region. It is also recorded as reflection nebula C130.
This region is noted as both an emission and reflection nebula, although sometimes only one aspect is noted.
The magnitude 1.1
Antares is 2° to the southeast of this nebula.
One of strongest 2.3 GHz sources in the region coincides with Sharpless 9.
There is a radio source on the edge, and it has been proposed that this is because there is a collision between this nebula and the dark nebula Kh 527.
Catalogs
Examples:
*
Sharpless 9
* Gum 65
* Cederblad 140
References
External links
Image of Sharpless-2 9
Scorpius
Emission nebulae
Reflection nebulae
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