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Annotated Central Milky Way Region

Annotated Central Milky Way Region

The central region of the Milky Way around and above Sagittarius. The center of our galaxy lies about 25,000 light years away in the direction of Sagittarius. Arguably, this is the busiest area of the night sky with a truly vast star-field containing numerous bright red nebula, super nova remnants, dark dust lanes and nebulae, star clusters, and other deep sky objects. The field of view is about 45 degrees across (top to bottom). Canon 5D Mark II (astromodified; Baader UV/IR cut) Canon 17-40mm L f4 lens at 40mm f5.6 ISO 640 CGEM mount Guided (Lacerta MGEN II) ISO 640 11x3min subexposures (33min total integration) PixInsight (calibrated, registered, stacked, post-processed) Photoshop (finish processing)

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Trifid Nebula (M20)

Trifid Nebula (M20)

Photo by Jeffrey Shokler. The Trifid Nebula presents the unusual combination of an emission nebula, a reflection nebula, and a dark nebula all in one object! The Trifid lies 5,200 light years from us in the constellation Sagittarius. Messier 21 (M21; NGC 6531) is the beautiful, small open cluster containing 57 stars that is visible to the upper left of the Trifid. M21 is 3,900 light years from us.

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Star Trails

Photo by Carol Santulis. EM1, 12mm/f/2.0, ISO 800, 6 sec, f/2 for 1.5 hours.

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Bubble Nebula (Caldwell 11)

Bubble Nebula (Caldwell 11)

Photo by Laurence Mohr. The Bubble Nebula (Caldwell 11) located ca. 10,000 light years away in the constellation Cassiopeia. The affect of the hot central star on the surrounding hydrogen gas is clearly visible - causing the gas to glow like a neon sign and forming it into a bubble with its stellar wind. 36 exposures at 10 min each; ISO 800; EdgeHD 1100; f/7; taken in Brooklyn, Wisconsin.

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Pleiades Star Cluster (M45)

Pleiades Star Cluster (M45)

Photo by Jeffrey Shokler. The Pleiades star cluster (Messier 45), also known as the "Seven Sisters," in the constellation Taurus. The Pleiades is a cluster of hundreds of stars located very close to us at about 430 light years away. Seven of the brightest members are visible to the naked eye. The amazing blue nebulosity, gas, and dust is not. Canon 5D MarkII; Stellarvue 130EDT; f/7; 12x6min exposures, calibrated (72min/1.2hr); ISO 1000; Guided (Lacerta MGEN II)

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Messier 74

Photo by Laurence Mohr. This is Messer 74, a spiral galaxy in Pisces, ~30 Mly. This object is about 1/3 the size of the full moon and is one of the faintest objects in the Messier catalog. 35 exposures at 10 min each; ISO 800; EdgeHD 1100; f/7

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3.4 Day Old Moon

3.4 Day Old Moon

Photo by Jeffrey Shokler. Canon 60D; Stellarvue 130EDT; f/7; ISO 1600; 1/125s

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Rosette Nebula (NGC 2239)

Rosette Nebula (NGC 2239)

Photo by Jeffrey Shokler. This is the Rosette Nebula (NGC 2239) which is a large, circular emission nebula (cloud of dust and gas) located about 5,500 light years away in the constellation Monoceros. In its center lies a beautiful cluster of young, hot stars (NGC 2244) call the "Rosette Cluster." The stars of the cluster were born in the nebula and it is ultraviolet radiation from them that causes the nebula to glow. ;Canon 5D Mark II (astromodified with with Baader UV/IR block filter); Stellarvue 130EDT; f/7; 1000 ISO; 15x6min subexposures (90mins/1.5hr total integration); Guided (Lacerta MGEN II); Calibrated, registered, stacked, post-processing in PixInsight (PI); Finish processing in Photoshop

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