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 NGC 2070 with a score of 9.61/10, followed by Orion Molecular Cloud Complex (9.55) and NGC 3372 (9.42).
NGC 2070
Within the Tarantula Nebula in the Large Magellanic Cloud, NGC 2070 identifies the rich young stellar concentration asso...
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...
Cosmic Reef
The Cosmic Reef is a nickname for a pair of nebulae, NGC 2014 and NGC 2020, located in the Large Magellanic Cloud. This...
Swan Nebula
The Swan Nebula, designated Messier 17 (M17), is a massive emission nebula and star-forming region located in the conste...
RCW 147
RCW 147, widely known as the Trifid Nebula or Messier 20, is a star-forming region located in the constellation Sagittar...
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...
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...
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...
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...
Sharpless 2-140
Sharpless 2-140, also known as S140, is an emission nebula and H II region in the constellation Cepheus, associated with...
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...
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...
summarize Quick Comparison Summary
| Alternative | Score | vs RCW 139 | Action |
|---|---|---|---|
| 9.61 Brilliant | +3.56 | Compare | |
| 9.55 Brilliant | +3.50 | Compare | |
| 9.42 Excellent | +3.37 | Compare | |
| 9.24 Excellent | +3.19 | Compare | |
| 9.22 Excellent | +3.17 | Compare | |
| 9.18 Excellent | +3.13 | Compare | |
| 9.11 Excellent | +3.06 | Compare | |
| 8.24 Great | +2.19 | Compare | |
| 7.82 Good | +1.77 | Compare | |
| 7.75 Good | +1.70 | Compare |
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