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The Orion Nebula, designated M42, is an emission nebula located approximately 1,344 light-years from Earth within the Orion constellation. It’s notable as one of the brightest nebulae visible to the naked eye and a prime location for star formation. Astronomers and amateur stargazers alike study thi...
The Eagle Nebula, designated M16, is a vast emission nebula within the Serpens molecular cloud complex approximately 7,000 light-years from Earth. It’s notable for its dramatic structures—particularly the “Pillars of Creation”—where new stars are actively forming. Astronomers and space enthusiasts s...
The Lagoon Nebula, formally Messier Object 8, is a vast emission nebula situated in the constellation Sagittarius approximately 4,100 light-years distant. It’s notable as one of the few star-forming regions readily visible to observers without telescopes from the Northern Hemisphere. This active neb...
The Trifid Nebula, also known as M20, is a stunning emission nebula located in the Sagittarius constellation. It’s notable for its distinctive trilobed structure formed by intense star formation. These three distinct regions are delineated by dark dust lanes, revealing the processes of stellar birth...
A bright emission nebula and active star-forming region in Sagittarius about 5,500 light-years away, also called the Swan Nebula for its distinctive curved shape.
A large circular emission nebula in Monoceros roughly 5,200 light-years away, surrounding the young open star cluster NGC 2244 whose radiation ionizes its glowing hydrogen gas.
A dense pillar of gas and dust within the IC 1396 H II region in Cepheus, sculpted by ultraviolet radiation from the massive star HD 206267 while harboring newly forming protostars.
A large emission nebula in Cassiopeia whose heart-shaped appearance is carved by radiation and stellar winds from hot massive stars in the central young open cluster Melotte 15.
A large emission nebula and active star-forming region in Cassiopeia, often imaged alongside the neighboring Heart Nebula (IC 1805), the pair spanning roughly 300 light-years together.
A reflection nebula in Orion just north of the Orion Nebula (M42), illuminated by a small cluster of hot blue stars and commonly captured in the same wide-field images as M42.
An emission nebula in Orion located directly adjacent to Alnitak, the easternmost star of Orion's Belt, and energized by ultraviolet radiation from that O-class supergiant.
An emission nebula in Cygnus separated from the adjacent North America Nebula by a molecular cloud, featuring active star formation and prominent ionization fronts along its border.
A dense sculpted ridge of ionized gas within the North America Nebula (NGC 7000) in Cygnus, forming one of the most photogenic and active star-forming interfaces in that complex.
A pillar-shaped dark nebula in Monoceros about 2,700 light-years away, part of the NGC 2264 star-forming complex, named for its conical silhouette against surrounding glowing gas.
An emission nebula and H II region in Cassiopeia containing the young open cluster IC 1590, notable for prominent dark Bok globules silhouetted against its glowing ionized gas.
An emission nebula in Scorpius about 8,000 light-years away, hosting the massive young star cluster Pismis 24, one of the most luminous stellar groupings in the Milky Way.
An emission nebula in Orion directly adjacent to and physically connected with the Orion Nebula (M42), first observed by Jean-Jacques Dortous de Mairan around 1731.
An active star-forming emission nebula in Scorpius about 5,500 light-years away, containing numerous protostars and dense molecular clouds making it one of the most productive stellar nurseries nearby.
An emission nebula in Cepheus surrounding the young open cluster NGC 7380, whose pareidolic wizard silhouette is most apparent in narrowband hydrogen-alpha imaging.
An emission nebula straddling the border of Monoceros and Canis Major whose broad wings and curved head closely resemble a seagull in flight when imaged in hydrogen-alpha light.
An emission and reflection nebula in Cygnus at the terminus of the dark nebula Barnard 168, enclosing a young star cluster still embedded in the gas and dust from which it formed.
An emission nebula in Orion forming an active H II star-forming region, featured prominently in a Hubble Space Telescope anniversary image released in 2014 highlighting newborn stars.
An emission nebula in Cassiopeia with curved, claw-shaped ionized hydrogen structures, part of a larger star-forming complex associated with the region near open cluster NGC 7538.
A diffuse emission and reflection nebula in Cepheus at the edge of a large molecular cloud, where hot young stars illuminate a cave-like opening in the surrounding dark gas.
An active ionization boundary in the Pelican Nebula (IC 5070) in Cygnus where ultraviolet radiation from young stars sculpts towering pillars and drives ongoing star formation.
An HII region in Cygnus whose Spitzer Space Telescope infrared image reveals a skull-like cavity structure blown by powerful winds from the embedded young star cluster.
A massive star-forming complex in the Perseus spiral arm of the Milky Way, one of the most productive and thoroughly studied regions of high-mass star formation in the outer Galaxy.
