L183 or L134N is a pre-stellar core in the constellation Serpens Cauda 360 light-years away. This massive accumulation of gas and dust was the interstellar object in which the phenomenon of coreshine was first investigated by astronomers and produced a new means of probing its previously opaque core.[2][3]

L183
Molecular cloud
L183 in different infrared wavelengths as imaged by the Spitzer Space Telescope
Observation data: J2000 epoch
Right ascension15h 54m 12.2s[1]
Declination−02° 49 42[1]
Distance360[citation needed] ly
Apparent diameter75[1]
ConstellationSerpens
DesignationsLDN 134N
See also: Lists of nebulae
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References

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