Nebulae - Event Horizon

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Most viewed - Nebulae

Sharpless2-136, the Ghost Nebula249 viewsReflection nebula in Cepheus. 1470 light-years distant, near the cluster NGC 7023.

Sharpless2-275 - The Rosette Nebula249 viewsHII region in the constellation Monoceros; distance 5,200 light-years from Earth. Open cluster NGC2244, in the doughnut hole, provides the energy that makes the nebula glow.

Sharpless2-13249 viewsEmission nebula in Scorpius.

NGC7000 - The North American Nebula248 viewsNarrowband image of an H-II emission nebula in the constellation Cygnus; only part of the nebula is visible since it is too large to fit entirely in the field of view of the telescope. 2,590 light-years distant and 90 light-years across.

Sharpless 2-64, emission nebula in Serpens248 viewsAn emission nebula in Serpens about 1000 light years distant. Dim and difficult to image. Sometimes called the Smoking Embers nebula.

IC2118, the Witch Hunt Nebula247 viewsFaint reflection nebula in Eridanus, usually known as the Witch Head Nebula, but it doesn't look much like a witch's head in this view, shot with an IDAS NBZ nebula enhancement filter, so maybe this version is best titled the "Witch Hunt Nebula." About 900 light-years away; illuminated by the nearby supergiant blue-white star Rigel in Orion.

M8, The Lagoon Nebula in Sagittarius246 viewsAn emission nebula lying 4000-6000 years from Earth. Also designated NGC 6523. An HII star-forming region. Contains the open cluster NGC 6530.

NGC 6543 - Cat's Eye Nebula246 viewsA structurally very complex planetary nebula about 3000 light-years from Earth in the constellation Draco. In large-telescope images it has the appearance of a cat's eye, but in my 5" refractor it appears simply as a bright blue star with a halo. The small spiral galaxy off to the left is probably NGC 6552.

M20 - the Trifid Nebula (narrowband)246 viewsAn emission/reflection nebula in Sagittarius. About 4100 light-years from Earth.

NGC6992 - The Eastern Veil Nebula245 viewsPart of the Cygnus Loop, a supernova remnant in Cygnus. Also known as the Network Nebula.

M20 - The Trifid Nebula242 viewsA combination of an open cluster of stars, an emission nebula (the lower, red portion), a reflection nebula (the upper, blue portion) and a dark nebula (which accounts for the gaps dividing the nebula into lobes). About 5000 light-years away in the constellation Sagittarius.

M42 - The Great Nebula in Orion240 viewsAnother take on the Great Orion Nebula, incorporating hydrogen-alpha data.

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Event Horizon - Astronomical and Terrestrial Images