Eta Carinae nebula

(redirected from Keyhole Nebula)

Eta Carinae nebula

(NGC 3372) A large complex of dust and glowing gas in the southern Milky Way. The nebulosity is an extended H II region in which there are clusters of young stars. Dark lanes of cool dust divide the nebula into islands of glowing gas. One of these dark and irregular dust lanes is known as the Keyhole, which is used to identify the bright emission Keyhole nebula in which the object Eta Carinae is situated.
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They range from the huge V-shaped avenue that divides the brightest part of the nebula from the main mass, prominent at 20x in my little refractor, to the tiny Keyhole Nebula, which I saw only at 200x in noted astrophotographer Daniel Verschatse's 14 1/2 inch scope.
Inaka's 3-D visual odyssey includes stereo images of all the constellations, Comet Hyakutake, Comet Hale-Bopp over Mount Fuji, meteor showers, Pluto, an eclipse of Jupiter by the Moon, the Great Andromeda Galaxy, Omega Centauri, the Keyhole Nebula, and more--lots more.
I zoomed in over the huge emission nebula's outer filaments, over its many silhouetted dust clouds, over the large scattered cluster Collinder 228 in its southern section, over its brilliant central masses bifurcated by a chevron-shaped dark lane, over the star sprays of the embedded clusters Trumpler 14 and 15, and then concentrated on the young stars of arrowhead-shaped Trumpler 16, a rich open cluster at the southern end of the dark Keyhole Nebula.