Deep sky object
Deep sky object (DSO) is a term used often in amateur astronomy to denote objects in the night sky other than solar system objects (such as planets, comets and asteroids), single stars and multiple star systems.
There are three categories of deep sky filters available; broad-band "light pollution" filters, narrow-band "nebula" filters, and the specialized "line" filters.
Deep sky
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Deep sky or Deep Sky Object (DSO, for short), which differs from deep space, ...
Although many deep sky objects can display a wide array of colors in long exposure photographs, the human eye is not sensitive enough to see most of these colors through a small telescope.
Deep Sky Objects:
While there are no Messier objects, several clusters are of some interest.
Deep Sky Objects:
One of Andromeda's greatest attractions is the spiral galaxy known as M 31. There are also several more deep sky objects worthy of attention.
deep sky object
An object in our night sky other than the bodies of the solar system and individual stars. Deep sky objects include nebulae, star clusters, and galaxies.
density
The mass of an object divided by its volume.
[edit] Deep sky objects
Centaurus contains ω Centauri (NGC 5139) which, despite being the constellation's "omega" listing, is the brightest globular cluster and largest of its kind in the Milky Way.
deep sky objects
degree
1. a unit of angular size equal to 1/360 the circumference of the celestial sphere; the sun and full moon both appear about half a degree wide
2. a unit of measure for temperature along a graded scale ...
Deep Sky objects
Quasars - Even the brightest star, at a luminosity of 40 million suns, it is still not the brightest object in the universe. This honor belongs to the Quasars, of which several hundred are currently known.
In deep sky, or wide field, photography we will want to calculate the area of the sky to capture on film.
Notable deep sky objects in Vela are the Eight-burst Nebula (NGC 3132), the Vela Supernova Remnant and the Gum Nebula.
As far as 'deep sky' objects, you will be able to see all the Messier objects in most any modern telescope. Galaxies will tend to look like bright blobs. Look a while longer and you may find some spiral arms or dust lanes (assuming it has them).
Now go truly "deep sky." Lynx is home to one of the most distant - - and massive -- globular clusters in the Galaxy, tenth magnitude NGC 2419.
The most famous deep sky object in Andromeda is a spiral galaxy Messier 31, the Andromeda Galaxy, one of the most distant objects visible to the naked eye (Messier 33, the Triangulum Galaxy, is slightly farther).
Among numerous deep sky objects in Ursa Major, a contrasting pair composed of M108 galaxy and the Owl Nebula (M97) offers the most interesting view.
List of Constellations
Winter Sky ...
Messier Objects - Deep sky objects list by Charles Messier (1730-1817). Charles Messier was a French Astronomer whose work on the discovery of comets led to the compilation of the Messier Catalogue of nebulae and star clusters.
The Sagittarius Star Cloud or Delle Caustiche, M 24, is not a real deep sky object, but a large star field; it is a part of our Milky Way. The naked eye it appears as a foggy patch, larger scopes reveal a breathtaking star cloud.
The Autostar computer display now showed the top tier in its database, "Select Object," under which was a scrollable list of OBJECT levels: "Solar System", "Constellation", "Deep Sky", "Star", "Satellite", "User Object", "Landmarks", and "Identify.
To increase the odds of finding good planetary nebula candidates to add to Kepler's monitoring list, professional astronomers enlisted the help of the Deep Sky Hunters. Kn 61 is their second confirmed detection to date, with a possible third to come.
The Milky Way flows though the entire constellation and the whole area is full of many astounding deep sky objects. Carina also contains Canopus, the second brightest star in the sky. Canopus is not visible from most of the mainland U.S.
With binoculars it is possible to see many deep sky objects (DSO's) albeit, not terribly well. Holding the binoculars can produce a shaky image.
Perseus is located along the Milky Way, so it is full of deep sky objects. M34 is an open cluster located northeast of Algol. The famous Double Cluster consists of clusters NGC 869 and NGC 884.
Jones, K. Webb Society Deep Sky Observer's Handbook (5 volumes) 1982, Enslow. Background info and rich catalogs of objects to observe.
Levy, D. Observing Variable Stars: A Guide for the Beginner. 1989, Cambridge U. Press.
This means that the evening might be excellent for observing planetary detail at 8pm, deep sky objects at 10pm, and double stars at midnight.
Method 1 ML= 3.7 + 2.5 * Log10(D2) where D = aperture in mm.
From "VISUAL ASTRONOMY FOR THE DEEP SKY" by Roger N. Clark.
Method 2 ML= 9.5 + 5.0 * Log10(D) where D = aperture in inches.
From "THE OBSERVATIONAL AMATEUR ASTRONOMER" by Patrick Moore.
Charles Messier was a France astronomy most notable for publishing an astronomical catalog consisting of deep sky objects such as nebulae and star clusters that came to be known as the 103 "Messier objects"....
, and Heinrich Olbers.
The M refers to Charles Messier an 18th century French astronomer and comet hunter. He compiled a list of deep sky fuzzy looking objects so they would not be mistaken for comets.
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And yes, you too will need a telescope or a good set of binoculars if you wish to see them yourself. Along with other deep sky objects such as the former planet Pluto.
"Deep sky" objects are very faint and require long exposures, which can be challenging. But many of the brighter objects in our solar system can be photographed very easily. Here are a few modest examples of my own: ...
5, the Andromeda Galaxy is an easy find from any dark sky, even without the use of an optical aid. Also, it is seen nearly three degrees across, making it one of the easiest deep sky objects to view.
Ara (abbr. Ara, gen. Arae)
The Altar; a small southern constellation that is rich in star clusters. See below for details of the constellation's brightest stars and interesting deep sky objects.
Stars brighter than magnitude 4.0
Star ...
The stunning spiral galaxy NGC 253 and the false-colored Chandra observation taken near its central region. NGC 253, with its furious star production, is a Seyfert galaxy.
(Credit: STScI/Deep Sky Survey (Optical), NASA/K. Weaver (X ray)) ...
The more light a telescope can gather (and focus into your eye, onto a photographic plate, or onto a CCD), the dimmer the objects it can resolve, and the brighter it can make those dim deep sky objects appear.
Lacerta had no bright stars or significant deep sky objects apart from 14th magnitude star-like object BL Lac, a prototype of an unusal kind of active galaxy whose nucleus varies in brightness by a few magnitudes over several days.
an objective lens giving a high focal ratio is best for viewing the planets and Moon because you can see the features well. A low focal ratio (4.5 to 6) produces a wider image but of low contrast so it is best for a telescope designed for deep sky ...
 See also: Sky, Star, Constellation, Light, Constellations
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