swap_horiz RCW 139 Alternatives
Looking for alternatives to RCW 139? Compare the top Nebula options ranked by our AI scoring system.
RCW 139
RCW 139 is an astronomical nebula also identified as Sh2-18, an H II region in the constellation Sagittarius. H II regions are clouds of ionized hydrogen associated with the formation of young stars. RCW 139 is also associated with masers, compact sources of stimulated microwave emission that can tr...
apps Top RCW 139 Alternatives
The top alternative to RCW 139 in 2026 is Orion Nebula (M42) with a score of 9.7/10, followed by Eagle Nebula (M16) (9.6) and NGC 2070 (9.6).
Orion Nebula (M42)
The Orion Nebula, designated M42, is an emission nebula located approximately 1,344 light-years from Earth within the Or...
Eagle Nebula (M16)
The Eagle Nebula, designated M16, is a vast emission nebula within the Serpens molecular cloud complex approximately 7,0...
NGC 2070
NGC 2070 is a massive star-forming region located within the Tarantula Nebula in the Large Magellanic Cloud, a satellite...
Orion Molecular Cloud Complex
The Orion Molecular Cloud Complex is a large collection of molecular clouds and associated nebulae in the constellation...
NGC 3372
NGC 3372, also known as the Carina Nebula, is a massive emission nebula located within the Carina Star Cloud. It’s notab...
Sh2-275
Sh2-275 represents the Rosette Nebula an emission nebula located within the Monoceros constellation. This star-forming r...
RCW 127
RCW 127 is the designation given to the massive star-forming region more commonly known as NGC 6334 or the Cat's Paw Neb...
IC 1396
IC 1396 is a large emission nebula and H II region in the constellation Cepheus, located approximately 2,400 light-years...
Wizard Nebula (NGC 7380)
The Wizard Nebula, officially designated as NGC 7380, is an emission nebula and young open star cluster located in the n...
Sh2-132
Sh2-132, commonly known as the Lion Nebula, is a large emission and diffuse nebula located in the constellation Cepheus....
Sh2-171
Sh2-171, also catalogued as NGC 7822, is a vast emission nebula and star-forming complex located in the constellation Ce...
Ced 214
Ced 214, also designated as Cederblad 214, is an emission nebula situated in the northern constellation of Cepheus. It f...
Sharpless 2-132
Sharpless 2-132, commonly called the Lion Nebula, is a large emission nebula in the constellation Cepheus. It lies in th...
Sh2-140
Sh2-140 is an emission nebula and H II region in the constellation Cepheus, catalogued in Stewart Sharpless's list of Ga...
Cave Nebula (Sh2-155)
Cave Nebula, also designated Sh2-155, is a diffuse emission nebula in Cepheus associated with the edge of a large molecu...
Sharpless 2-140
Sharpless 2-140, also known as S140, is an emission nebula and H II region in the constellation Cepheus, associated with...
RCW 136
RCW 136 is an astronomical object catalogued as a planetary nebula near the boundary between the constellations Scorpius...
RCW 108
RCW 108 is a star-forming H II region in the constellation Ara, about 4,000 light-years from Earth. An H II region is a...
RCW 153
RCW 153 is Sh2-37 or IC 1284, a Sagittarius emission nebula near the galactic center line, with active star formation an...
RCW 104
RCW 104 is an emission nebula in the southern Milky Way, located in the constellation Norma. The object is listed in the...
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