NGC 6891 and NGC 6905
Delphinus is a small constellation in the equatorial region of the sky, with a distinctive kite-shape. Although small in size, Delphinus contains a variety of deep sky objects for backyard telescopes.
The acronym NGC stands for "New General Catalogue" and usually precedes a number in the catalogue, like NGC 4258 for example. The catalogue refers to objects which are extended and distinctly non-star like in nature.
NGC 6872 and IC 4970
This image is a three-colour composite, this time reproduced from one blue (B), one green-yellow (V) and one red (R) exposure, obtained with FORS1 at ANTU in the morning of March 29, 1999. The field size is again 6.8×6.8 arcmin 2.
NGC 6193: The "Four-In-One" Cluster
By Brian Ventrudo
This young star cluster in the southern skies was born just 3 million years ago from gas and dust compressed by a nearby supernova explosion.
NGC 253, a starburst galaxy
On the left, you see an image of the spiral galaxy NGC 253, taken with a ground-based telescope. The galaxy is located about 8 million light-years away in the constellation Sculptor.
From Jim Kaler's STARS; Return to Planetary Nebulae ...
In most planetaries (like the famous Cat's Eye nebula, and the less famous but also cool ~ 6826) the outer halo slams into material floating in interstellar space, causing it to get all clumpy or form a bright rim as the surrounding matter gets plowed up.
~ 4755 is located at R.A.: 12:53.6 and Dec: -60:20
This cluster was discovered by Nicolas Louis de Lacaille from an observing station in South Africa during his stay there from 1751 to 1752.
The ~ (deep sky) Objects
Once you click onto a particular link use the "Find" feature of
your browser to locate the ~ object on that page.
~ 55 ...
~ 13, 20, and 21 lie within the same field of view, and all are within half a degree of a magnitude 7.1 star.
~ 4889 is a member of the Coma Galaxy Cluster, which lies about 300 million light-years away. But the quasar 3C 273 is 2 billion light-years away. While a little fainter than ~ 4889, it should be barely visible in your 5-inch if you have a dark sky.
~ 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 17,000 parsecs in diameter and approximately 20 million parsecs distant.
Find your inner astronomer. Your complete guide to amateur astronomy.
~ 6231: A fine open cluster, composed of over one hundred stars in a compact 15' area. It actually lies on another spiral arm of our galaxy, closer to the galactic center.
~ 7603 is a Seyfert galaxy with disturbed form and an apparent companion along an extended arm or tail. ~ 7603 has a redshift of 8700 km/s and the companion is at 17,000 km/s.
New General Catalogue -- A catalogue of 7,840 nebulae, star clusters, and galaxies that was published in 1888 by John Dreyer.
An acronym for New General Catalog of Nebulae and Clusters of Stars, first compiled in 1888 by Danish astronomer J.L.E. Dreyer at Armagh Observatory, Ireland. Today the catalog contains 7840 deep-sky objects.
~. New General Catalogue. A list of some 7000 plus deep-sky objects.
Nodes. The points at which the orbit of the Moon, a planet or a comet intersect with the plane of the ecliptic; south to north (Ascending Node), north to south (Descending Node).
Finest ~ Objects (RASC Observing List)
This list contains selection of 109 targets out of 7840 New General Catalogue (~) objects as well as one (1) from a supplementary Index Catalogue (IC) of 5386 objects.
~ 1313 is a barred spiral galaxy 15 million light years away in the Southern Hemisphere constellation of Reticulum.
~ 253, a nearly edge-on spiral galaxy (type Sc) in the constellation Sculptor. ~ 253 lies about 8 million light years away. © European Southern Observatory Wide Field Imager, Max-Planck-Institut für Astronomie, Osservatorio Astronomico di Capodimonte.
~ 6333 or Messier 9 is a globular cluster, one of the nearest ones to the centre of the Milky Way. It is about 25,800 light-years distant from Earth. ~ 6254 or Messier 10 is another globular cluster about 14,300 light-years distant.
~ 613 is a barred spiral galaxy in the southern constellation Sculptor. The galaxy is inclined by 32° and, contrary to most barred spirals, has many arms that give it a tentacular appearance.
~ 6822: a dwarf irregular galaxy in the Local Group.
IC 5152: a dwarf irregular galaxy in the Local Group.
~ 1313: a starburst galaxy also called a barred spiral galaxy (SBc).
Canes Venatici (Canum Venaticorum)
Cor Caroli (Alpha Canum Venaticorum)
Canis Major (Canis Majoris) ...
The ~ (New General Catalog) is a list of over 13,000 deep-sky celestial objects. It was developed in 1888. For example, the Great Nebula in Orion is NCG 1976 (and M42). NGC4414 (pictured above) is a spiral galaxy 60 million light-years away.
More about Planetary Nebulare from George Jacoby's (b& w) Planetary Nebula Gallery.
Planetary Nebulae at the SED's Messier Gallery.
The Planetary Nebula Observer's HomePage includes more links to Planetary Nebula Resources.
The Local Group is the cluster of galaxies to which we belong. It is a group of about 30 galaxies that is about 5 million light-years across. The largest of the galaxies are Andromeda galaxy, Triangulum, and our Milky Way.
~ 604 is even larger than the Tarantula nebula at about 1,300 light-years across, although it contains slightly fewer stars. It is one of the largest H II regions in the Local Group.
Current issues in studies of H II regions ...
~ 5466 is a large but quite dim globular cluster. It's found nine degrees north of Arcturus and one and a half degrees west.
Brightest Stars: Arcturus, Nekkar (a.k.a. Merez), Seginus (a.k.a. Haris), Izar ...
~ 2997 showing H II regions in the spiral arms.
Credit: 2dF Quasar Survey
Quasar Spectra ...
~ 4151 is the brightest Seyfert galaxy. Its coordinates are RA = 12h 10.5m, dec = +39 ° 24', and it can be found below the Big Dipper in Canes Venatici. At magnitude 10"12 (it is variable), it should be visible in an 8-inch telescope, but it will be challenging to find. Its distance is 13.5 Mpc.
AAT 25. ~ 4755, the Jewel Box open cluster in Crux
AAT 83. ~ 5189, weird planetary nebula in Musca ...
This is ~ 7023.
This is the Vela Supernova Remnant. This nebula is the remnant of a supernova that exploded about 10,000 years ago.
(225K JPG) ...
3. Galaxy ~ 4442 is 120 Mpc away. If the Hubble Constant is 68 km/s/Mpc, how fast should ~ 4442 be moving due to the expansion of the Universe?
Solution: Another "pop into formula"
v = Ho d
v = 68 x 120
v = 8200 km/s ...
Supernova in ~ 5806
Star Clusters on a Collision Course (30 Doradus)
Phoenix Cluster Sets Record Pace at Forming Stars ...
Star clusters ~ 2244, ~ 2506, M 50
Meteor Shower: December Monocerids, Alpha Monocerids ...
Spiral galaxy ~ 3982. Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA) ...
Messier 74 or ~ 628 is a face-on spiral galaxy in the constellation Pisces Wikipedia
Hoag's Galaxy is a Ring Galaxy
Black Feathered Sun
Pinwheel Galaxy Wikipedia ...
30 Doradus (~ 2070)
A giant HII region, at least 300 pc across - one of the largest known - in the Large Magellanic Cloud. It is larger and more luminous than any known in the Galaxy.
the Milky Way
~ 5907 (a galaxy with a warp)
M31 (the Andromeda galaxy), which you can see with the naked eye.
low surface brightness galaxy ...
Open star cluster ~ 6025
This nice little constellation is located close to circumpolar regions of the south pole of the sky. It is lying between DECL=-60 degrees and DECL=-70 degrees and RA=17h and RA=15h.
Slee identify ~ 4486 (M87) and ~ 5128 as extragalactic radio sources,
1953 - Gerard de Vaucouleurs discovers that the galaxies within approximately 200 million light years of the Virgo cluster are confined to a giant supercluster disk, ...
The first object we willl view is M35, also known as ~ 2168. This cluster is magnitude 5, and can be found nearly directly in the middle of the triangle we discussed above.
It lies at the southern edge of (20:3:37.4+29:53:48.5, ICRS 2000.0) of Constellation Cygnus, the Swan -- northeast of Albireo (Beta1 Cygni); and south of Sadr (Gamma Cygni), the Crescent Nebula (~ 6888), and the open star cluster ~ 6871; ...
The Antennae Galaxies (also known as ~ 4038 and 4039) are a pair of distorted colliding spiral galaxies about 70 million light-years away, in the constellation of Corvus (The Crow).
97 micrometres due to solid ammonia on interstellar grains in the Becklin-Neugebauer object and probably in ~ 2264-IR as well. This detection helps explain the physical shape of previously poorly-understood related ice absorption lines.
Orton et al.
This stellar swarm is M80 (~ 6093), one of the densest of the 147 known globular star clusters in the Milky Way galaxy. Located about 28,000 light-years from Earth, M80 contains hundreds of thousands of stars, all held together by their mutual gravitational attraction.
This NASA Hubble Space Telescope image shows one of the most complex planetary nebulae ever seen, ~ 6543, nicknamed the "Cat's Eye Nebula." Hubble reveals surprisingly intricate structures including concentric gas shells, jets of high-speed gas and unusual shock-induced knots of gas.
give a Cepheid distance to ~ 4258, where Herrnstein et al. found a distance of 7.2 Mpc based on observing the velocity and angular radius of a disk of masers around the nucleus, and both the angular velocity and the centripetal acceleration of the masers. Cepheids in ~ 4258 were 10.
There are many interesting celestial objects in this large constellation, including globular clusters (M2 and M72), planetary nebulae (~ 7009 and ~ 7293), the star group M73, a double star (zeta Aqr).
Three Boötes double stars, globular cluster ~ 5986, and elliptical galaxy ~ 5846
The Jewel Box Cluster (~ 4755), spiral galaxy M102, and globular cluster Palomar 5
Summer Observing Targets for Small Telescopes
Summer Observing Targets for Large Telescopes ...
Carina also contains ~ 2516, a beautiful globular cluster, best in binoculars and ~ 2808, a naked-eye globular cluster. The prow of the ship contains four stars that are often called the False Cross.
New General Catalogue (~)
The New General Catalog (~) is a list of over 13,000 deep-sky celestial objects, such as galaxies, globular clusters and nebulae. It was developed in 1888 by the astronomer J.L.E. Dreyer, and often celestial objects are referred to by their list number, e.g.
HERBIG-HARO OBJECT - Small bright nebula in a star-forming region, named after the American astronomer George Herbig and Guillermo Haro who discovered the first three such objects in 1946-1947 in images of the nebula ~ 1999 in Orion.
It also contains many star clusters, such as Messier 30, as well as the elliptical galaxy ~ 7103 and the spiral galaxy ~ 6907. The Capricornids meteor shower is also a feature of this constellation, peaking annually around July 30th when up to 30 meteors per hour can be seen in the night sky.
Star-forming region in the nebula ~ 604 (in the galaxy M33).
In each of these examples there is strong evidence that stars are being born in the region shown in the image; presumably, at least in some of the cases, attendant solar systems are being formed also.
New General Catalogue (~) - (n.)
The common name for "A New General Catalogue of Nebulae and Clusters of Stars," put together by J. L. E. Dreyer in 1888.
noble gas - (n.) ...
Index Catalogue of Nebulae and Clusters of Stars
New General Catalogue of Nebulae and Clusters of Stars
Collinder's Catalogue of Open Star Clusters
Melotte Catalogue of Star Clusters ...
Million Star Cluster ~ 2808
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NEW GENERAL CATALOGUE (~)
A catalogue containing some 7840 nebulae, star clusters and galaxies. The catalogue number is frequently used as the name for an object.
NEWTONIAN TELESCOPE ...
He called it the New General Catalogue. More information was added in the 20 next years such that its listings reached close to 15,000 objects. Astronomers refer to galaxies and nebulae by their ~ numbers. For example, the Crab Nebula is called NGC1952.
In contrast, the Andromeda galaxy, which is also known as M31 and as ~ 224, is much small on the sky, less than three degrees in length, which is larger than the Moon or the Sun. It can only be seen when the sky is very clear, and generally only the inner bulge of the galaxy is visible.
The second, known as ~ 5195, is interacting with M51. The outer regions of the two galaxies actually touch each other. M51 is located about 37 million light-years from Earth. Under dark skies, it is an easy target for small telescopes.
Pressing the scroll keys on the Autostar told me further information about the Helix Nebula including its designation as ~ 7293, that it is a planetary nebula, that it is positionally at RA 22:29.6 and Dec. -20 deg. 48 min., that it is in the constellation Aquarius, has a magnitude of 6.
See also: What is the meaning of Astro, Star, Sky, Galaxy, Astronomer?