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The Lagoon nebula (M8) in Sagittarius
auteur: P.Mortfield/S.Cancelli/Novapix
référence: a-neb65-23003
Image Size 300 DPI: 33 * 33 cm
The Lagoon nebula (M8), can be visible to the unaided eye as a small bright patch above the large Sagittarius star cloud in the Milky Way. The Lagoon nebula is a star-forming region about 5800 light years from us. The nebula is illuminated by several O-type giants within the open cluster NGC 6530 near the center of the nebula. The brightest part of the nebula is known as the "hourglass nebula" and its gases are excited primarily by two massive O-type supergiants designated Herschel 36 and 9 Sagittarii. At least 60 B-type giants are embedded in the nebula which make M8 3 to 4 times richer in massive stars than the Orion nebula.
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