[{"n": "Scorpius OB1", "u": "/e/emission-dark-and-reflection-nebulae/scorpius-ob1/", "s": "Young OB association with massive stars and active star formation."}, {"n": "Sh 2-101", "u": "/e/emission-dark-and-reflection-nebulae/sh-2-101/", "s": "Tulip-shaped emission nebula near the black hole Cygnus X-1."}, {"n": "Sh 2-264", "u": "/e/emission-dark-and-reflection-nebulae/sh-2-264/", "s": "A star-forming ring nebula in Orion, ionized by blue giant λ Orionis."}, {"n": "Sharpless catalog", "u": "/e/emission-dark-and-reflection-nebulae/sharpless-catalog/", "s": "Catalog of 313 H II regions, planetary nebulae, and supernova remnants."}, {"n": "Star-forming regions of Cassiopeia", "u": "/e/emission-dark-and-reflection-nebulae/star-forming-regions-of-cassiopeia/", "s": "A northern sky region of multiple star-forming complexes at varying distances."}, {"n": "Star-forming regions of Vela", "u": "/e/emission-dark-and-reflection-nebulae/star-forming-regions-of-vela/", "s": "Overlapping star-forming systems along the line of sight in Vela."}, {"n": "Westerhout 40", "u": "/e/emission-dark-and-reflection-nebulae/westerhout-40/", "s": "One of the nearest sites of massive star formation."}, {"n": "Westerhout 49", "u": "/e/emission-dark-and-reflection-nebulae/westerhout-49/", "s": "A giant HII region hosting some of the most massive stars known."}, {"n": "HH 1/2", "u": "/e/emission-dark-and-reflection-nebulae/hh-1-2/", "s": "First recognized Herbig-Haro objects, a bright bow-shock pair in Orion."}, {"n": "HH 46/47", "u": "/e/emission-dark-and-reflection-nebulae/hh-46-47/", "s": "A protostellar jet complex that revealed the nature of Herbig–Haro objects."}, {"n": "HH 111", "u": "/e/emission-dark-and-reflection-nebulae/hh-111/", "s": "A prototype of highly collimated optical jet sources in Orion."}, {"n": "DQ Herculis", "u": "/e/emission-dark-and-reflection-nebulae/dq-herculis/", "s": "Prototype intermediate polar and bright nova of 1934."}, {"n": "FH Serpentis", "u": "/e/emission-dark-and-reflection-nebulae/fh-serpentis/", "s": "A 1970 nova observed across multiple wavelengths with an expanding shell."}, {"n": "HR Delphini", "u": "/e/emission-dark-and-reflection-nebulae/hr-delphini/", "s": "A slow nova with a jittering light curve and a bipolar remnant nebula."}, {"n": "RR Pictoris", "u": "/e/emission-dark-and-reflection-nebulae/rr-pictoris/", "s": "A slow nova discovered in 1925 by an amateur astronomer."}, {"n": "T Pyxidis", "u": "/e/emission-dark-and-reflection-nebulae/t-pyxidis/", "s": "A recurrent nova that may become a Type Ia supernova."}, {"n": "V476 Cygni", "u": "/e/emission-dark-and-reflection-nebulae/v476-cygni/", "s": "A fast nova with a dust dip and an expanding shell."}, {"n": "V1500 Cygni", "u": "/e/emission-dark-and-reflection-nebulae/v1500-cygni/", "s": "Second intrinsically brightest nova of the 20th century."}, {"n": "V1974 Cygni", "u": "/e/emission-dark-and-reflection-nebulae/v1974-cygni/", "s": "First nova observed across the full electromagnetic spectrum."}, {"n": "BAT99-98", "u": "/e/emission-dark-and-reflection-nebulae/bat99-98/", "s": "Massive Wolf–Rayet star near the R136 cluster in the Tarantula Nebula."}, {"n": "HD 38282", "u": "/e/emission-dark-and-reflection-nebulae/hd-38282/", "s": "A massive spectroscopic binary of two luminous Wolf-Rayet stars."}, {"n": "R136", "u": "/e/emission-dark-and-reflection-nebulae/r136/", "s": "Central starburst cluster in the Tarantula Nebula, LMC."}, {"n": "R136a1", "u": "/e/emission-dark-and-reflection-nebulae/r136a1/", "s": "The most massive and luminous star known, in the Tarantula Nebula."}, {"n": "R136a2", "u": "/e/emission-dark-and-reflection-nebulae/r136a2/", "s": "One of the most massive and luminous stars known."}, {"n": "R136a3", "u": "/e/emission-dark-and-reflection-nebulae/r136a3/", "s": "A massive Wolf–Rayet star in the R136 cluster."}, {"n": "R145", "u": "/e/emission-dark-and-reflection-nebulae/r145/", "s": "A binary system of two exceptionally luminous stars in the Tarantula Nebula."}, {"n": "VFTS 102", "u": "/e/emission-dark-and-reflection-nebulae/vfts-102/", "s": "A rapidly rotating runaway star in the Tarantula Nebula."}, {"n": "VFTS 352", "u": "/e/emission-dark-and-reflection-nebulae/vfts-352/", "s": "The most massive overcontact binary system known."}, {"n": "VFTS 682", "u": "/e/emission-dark-and-reflection-nebulae/vfts-682/", "s": "An extremely massive, isolated Wolf–Rayet star in the Tarantula Nebula."}, {"n": "Wolf–Rayet nebula", "u": "/e/emission-dark-and-reflection-nebulae/wolf-rayet-nebula/", "s": "Nebulae sculpted by the fierce winds of Wolf–Rayet stars."}, {"n": "Protoplanetary nebula", "u": "/e/emission-dark-and-reflection-nebulae/protoplanetary-nebula/", "s": "A short-lived infrared reflection nebula between AGB and planetary nebula phases."}, {"n": "AS 314", "u": "/e/emission-dark-and-reflection-nebulae/as-314/", "s": "A protoplanetary nebula reclassified from hypergiant to post-AGB star."}, {"n": "Boomerang Nebula", "u": "/e/emission-dark-and-reflection-nebulae/boomerang-nebula/", "s": "The coldest natural place in the known universe."}, {"n": "Calabash Nebula", "u": "/e/emission-dark-and-reflection-nebulae/calabash-nebula/", "s": "A protoplanetary nebula in Puppis, near NGC 2438."}, {"n": "Cotton Candy Nebula", "u": "/e/emission-dark-and-reflection-nebulae/cotton-candy-nebula/", "s": "A faint bipolar protoplanetary nebula in Scorpius."}, {"n": "Egg Nebula", "u": "/e/emission-dark-and-reflection-nebulae/egg-nebula/", "s": "A bipolar protoplanetary nebula with bright arcs and polarized light."}, {"n": "Frosty Leo Nebula", "u": "/e/emission-dark-and-reflection-nebulae/frosty-leo-nebula/", "s": "First bipolar protoplanetary nebula with point reflection symmetry."}, {"n": "IRAS 19475+3119", "u": "/e/emission-dark-and-reflection-nebulae/iras-19475-3119/", "s": "A protoplanetary nebula with a quadrupolar structure and pulsating central star."}, {"n": "LL Pegasi", "u": "/e/emission-dark-and-reflection-nebulae/ll-pegasi/", "s": "A binary carbon star hidden in a precise Archimedean spiral nebula."}, {"n": "CW Leonis", "u": "/e/emission-dark-and-reflection-nebulae/cw-leonis/", "s": "A carbon star embedded in a thick dust envelope."}, {"n": "M1-92", "u": "/e/emission-dark-and-reflection-nebulae/m1-92/", "s": "Bipolar protoplanetary nebula in Cygnus, also called the Footprint Nebula."}, {"n": "Post-AGB star", "u": "/e/emission-dark-and-reflection-nebulae/post-agb-star/", "s": "Luminous low-mass supergiants in a late phase of stellar evolution."}, {"n": "Red Rectangle", "u": "/e/emission-dark-and-reflection-nebulae/red-rectangle/", "s": "A protoplanetary nebula with a rectangular shape and X-shaped spikes."}, {"n": "Red Square Nebula", "u": "/e/emission-dark-and-reflection-nebulae/red-square-nebula/", "s": "A nearly perfectly symmetrical square nebula around star MWC 922."}, {"n": "Westbrook Nebula", "u": "/e/emission-dark-and-reflection-nebulae/westbrook-nebula/", "s": "A bipolar protoplanetary nebula in Auriga, transitioning toward a planetary nebula."}, {"n": "UW Canis Majoris", "u": "/e/emission-dark-and-reflection-nebulae/uw-canis-majoris/", "s": "A Beta Lyrae eclipsing contact binary in Canis Major."}, {"n": "WR 104", "u": "/e/emission-dark-and-reflection-nebulae/wr-104/", "s": "Triple star system with a pinwheel nebula and potential gamma-ray burst risk."}]