4th oldest Open Cluster in our Milky Way.4 Billion years old.
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Cosmic Category
- AA_Dark Nebula (3)
- AA_Emission Nebula (6)
- AA_Galaxy (13)
- AA_Galaxy Cluster (1)
- AA_Globular Cluster (2)
- AA_Nebulae (3)
- AA_Open Cluster (5)
- AA_Planetary Nebulae (3)
- AA_Reflection Nebula (5)
- Abell 21 (1)
- Alpha Canis Majoris (1)
- Antares (1)
- B 33 (1)
- B 92 (1)
- B 93 (1)
- Brocchi's cluster (1)
- Cartwheel galaxy (1)
- Cat's eye Nebula (1)
- Centaurus A (1)
- Cigar Galaxy (1)
- Coathanger (1)
- Cocoon Galaxy (1)
- Cr 399 (1)
- Cr 469 (1)
- Flame Nebula (1)
- Fornax Cluster of Galaxies (1)
- galaxy (1)
- Helix Nebula (1)
- HorseHead Nebula (1)
- IC 342 (1)
- IC 434 (1)
- IC 4603 (1)
- IC 4604 (1)
- IC 4605 (1)
- IC 4606 (1)
- in Andromeda (1)
- in Aquarius (1)
- in Cancer (1)
- in Canes Venatici (1)
- in Canis Major (2)
- in Centaurus (1)
- in Cepheus (1)
- in Cetus (1)
- in Corvus (1)
- in Draco (1)
- in Eridanus (1)
- in Fornax (1)
- in Gemini (1)
- in Horologium (1)
- in Leo (1)
- in Orion (3)
- in Sagittarius (3)
- in Scorpius (1)
- in Sculptor (3)
- in Traingulum (1)
- in Virgo (1)
- in Vulpecula (1)
- Lagoon Nebula (1)
- LBN 938 (1)
- LBN 939 (1)
- Leo Triplet (1)
- M 20 (1)
- M 24 (1)
- M 33 (1)
- M 4 (2)
- M 65 (1)
- M 66 (1)
- M 67 (1)
- M 77 (1)
- M 78 (1)
- M 8 (1)
- Maffei 1 (1)
- Medusa Nebula (1)
- MIB Cat Gal (1)
- NGC 1055 (1)
- NGC 1068 (1)
- NGC 1300 (1)
- NGC 1365 (1)
- NGC 1399 (1)
- NGC 1404 (1)
- NGC 1427A (1)
- NGC 1512 (1)
- NGC 1977 (1)
- NGC 1981 (1)
- NGC 2023 (1)
- NGC 2024 (1)
- NGC 2064 (1)
- NGC 2068 (1)
- NGC 2071 (1)
- NGC 2359 (1)
- NGC 253 (1)
- NGC 3628 (1)
- NGC 4038 (1)
- NGC 4039 (1)
- NGC 4490 (1)
- NGC 5128 (1)
- NGC 55 (1)
- NGC 598 (1)
- NGC 604 (1)
- NGC 6144 (1)
- NGC 6523 (1)
- NGC 6530 (1)
- NGC 6543 (1)
- NGC 6603 (1)
- NGC 7293 (1)
- NGC 891 (1)
- PGC 2248 (1)
- PGC 2249 (1)
- PGC 2252 (1)
- PGC 3170815 (1)
- Phantom (1)
- PK 205+14.1 (1)
- Rho Ophiuchi Nebula (1)
- Ringtail Galaxy (1)
- Running Man Nebula (1)
- Seyfert Galaxy (1)
- Sirius (1)
- Sombrero Hat (1)
- starcloud (1)
- Thor's Helmet (1)
- Trifid Nebula (1)
Processing for Colors of Cosmos
The DSS images are 1/1.7/2 arc-sec per pixel which is v.good resolution.But unfortunately they are available in Red,Blue & IR filtered data;essentially appearing monochrome.The Green filter image is not there at all.Thus the images posted here are created by synthesizing Green channel digitally,then merging with R&B plate images.
This technique holds good unless an object[e.g.planetary nebula] emits predominantly in green light leading to deviation from true appearance/features visible in composed image.
Sometimes for heavily reddened objects/unavoidable situations,[e.g.Sirius,IC 10]I've used IR data to fortify the real nature of object leading to kind of IR-Visual images.The range of multiwavelength data is not much.Will be using more surveys soon for that.
This technique holds good unless an object[e.g.planetary nebula] emits predominantly in green light leading to deviation from true appearance/features visible in composed image.
Sometimes for heavily reddened objects/unavoidable situations,[e.g.Sirius,IC 10]I've used IR data to fortify the real nature of object leading to kind of IR-Visual images.The range of multiwavelength data is not much.Will be using more surveys soon for that.
Contributors
ABOUT DSS DATA
The Digitized Sky Surveys were produced at the Space Telescope Science Institute under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope. The plates were processed into the present compressed digital form with the permission of these institutions.
The National Geographic Society - Palomar Observatory Sky Atlas (POSS-I) was made by the California Institute of Technology with grants from the National Geographic Society.
The Second Palomar Observatory Sky Survey (POSS-II) was made by the California Institute of Technology with funds from the National Science Foundation, the National Geographic Society, the Sloan Foundation, the Samuel Oschin Foundation, and the Eastman Kodak Corporation.
The Oschin Schmidt Telescope is operated by the California Institute of Technology and Palomar Observatory.
The UK Schmidt Telescope was operated by the Royal Observatory Edinburgh, with funding from the UK Science and Engineering Research Council (later the UK Particle Physics and Astronomy Research Council), until 1988 June, and thereafter by the Anglo-Australian Observatory. The blue plates of the southern Sky Atlas and its Equatorial Extension (together known as the SERC-J), as well as the Equatorial Red (ER), and the Second Epoch [red] Survey (SES) were all taken with the UK Schmidt.
All data are subject to the copyright given in the copyright summary. Copyright information specific to individual plates is provided in the downloaded FITS headers.
Supplemental funding for sky-survey work at the ST ScI is provided by the European Southern Observatory.
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