swap_horiz Ou4 Alternatives
Looking for alternatives to Ou4? Compare the top Nebula options ranked by our AI scoring system.
Ou4
Ou4 represents a significant bipolar emission nebula situated within the Sh2-129 star formation region of the Cepheus constellation. This outflow, first observed in 2011 by amateur astronomer Nicolas Outters, is notable for its distinct twin jets extending outwards from a central source. Astronomers...
apps Top Ou4 Alternatives
The top alternative to Ou4 in 2026 is Elephant's Trunk Nebula with a score of 9.0/10, followed by Homunculus Nebula (8.9) and Sharpless 2-106 (8.9).
Elephant's Trunk Nebula
The Elephant’s Trunk Nebula, formally IC 1396A, is a dark emission nebula located in the Cepheus constellation approxima...
Homunculus Nebula
The Homunculus Nebula is a stunning bipolar emission nebula associated with the supernova remnant of Eta Carinae. This c...
Sharpless 2-106
Sharpless 2-106 is a bipolar emission nebula located within the Cygnus constellation. It’s notable for its distinct twin...
Sharpless 2-106 (Sh2-106)
Sharpless 2-106 is a bipolar emission nebula located approximately 2,000 light-years from Earth in the constellation Cyg...
NGC 7822
NGC 7822 is a vibrant emission nebula located within the Cepheus constellation. It’s notable for its active star formati...
Squid Nebula
The Squid Nebula, formally designated OU4, is a faint emission nebula located within the Cepheus OB Association. It’s re...
Dragon's Egg Nebula (NGC 6164)
The Dragon's Egg Nebula, comprising NGC 6164 and NGC 6165, is a bipolar emission nebula in the constellation Norma. Its...
NGC 6164/6165
NGC 6164 and NGC 6165 form a bipolar emission nebula located in the southern constellation of Norma. The nebula's hourgl...
NGC 6164
NGC 6164 is a bipolar emission nebula located in the southern constellation of Norma. The cosmic structure was expelled...
Wizard Nebula
The Wizard Nebula, formally designated SH2-142, is an emission nebula notable for its intricate structure resembling a w...
Sh2-129
Sh2-129, also known as the Flying Bat Nebula, is a significant emission nebula located within the Cepheus OB2 associatio...
Flying Bat Nebula
The Flying Bat Nebula, also known as SH2-129, is a diffuse emission nebula located in the Cepheus constellation. It’s re...
IC 1396
IC 1396 is a large emission nebula and H II region in the constellation Cepheus, located approximately 2,400 light-years...
Cave Nebula
The Cave Nebula, officially Sh2-155, is a diffuse emission nebula located within the Cepheus OB3 star cluster. It’s nota...
Dragon's Egg Nebula (NGC 6164-5)
The Dragon's Egg Nebula, designated NGC 6164-5, is a bipolar emission nebula located in the southern constellation of No...
Sh2-155
Sh2-155, also known as the Cave Nebula, is a dark emission nebula located within the Cepheus B cloud approximately 2,400...
Lion Nebula
The Lion Nebula, catalogued as Sharpless 2-132, is a large emission nebula and H II region in the constellation Cepheus....
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 (Lion Nebula)
Sh2-132, commonly known as the Lion Nebula, is an extensive emission nebula located in the northern constellation of Cep...
Sh2-171
Sh2-171, also catalogued as NGC 7822, is a vast emission nebula and star-forming complex located in the constellation Ce...
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