Emission Nebulae
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Messier 17 - Emission Nebula
X-Ray: ROSAT
Visible: AAO
Infrared: 2MASS
Radio: VLA
Messier 20 - The Trifid Nebula
X-Ray: ROSAT
Visible: NOAO/AURA
Infrared: Spitzer
Radio: NVSS
30 Doradus - The Tarantula Nebula
X-Ray: ROSAT
Ultraviolet: ASTRO-1
Visible: AAO
Infrared: Spitzer
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