Coma (optics)
Coma of a single lens
In optics (especially telescopes), ...
COMA BERENICES CLUSTER
Though only 283 light years away, the the 400-million-year-old Coma Berenices star cluster still appears faint to the eye.
Coma (cometary)
In astronomy, the nebulous envelope around the nucleus of a comet is called its coma (from the Latin word for "hair").
Coma Berenices
Transit Date of principal star:
9 April
The constellation Coma Berenices refers to a classical story concerning the hair of Berenice, the wife of Ptolemy III of Egypt.
Coma
Related Category: Astronomy: General
in astronomy: see comet.
More on Coma
Comet - [Gr.
Coma Berenices
Map created in Guide 7.0 with the figure outline based on Johannes Hevelius' Uranographia (1690). Click on the object's name to access its image or click on the name of adjacent constellation to see its map.
Coma Berenices
Please hover over any star to get more information
Coma Berenices, or Berenice's Hair, is a constellation in the northern hemisphere.
Coma Berenices
Abbreviation: Com
Genitive: Comae Berenices
Translation: Berenice's Hair
Sky Chart
Peoria Astronomical Society Coma Berenices Page
Interactive star chart (Java applet) ...
Coma Berenices, Berenice's hair:
One of the last of the ancient constellations.
Coma Berenices
Abbreviation: Com English name: Berenice's Hair Coordinates see Stellar data
Particulars: ...
The gas coma consists of molecules liberated from the nucleus by solar heating.
Coma Berenices, the flowing tresses of an Egyptian queen, from the Uranographia of Johann Bode.
The Coma Cluster is home to a menagerie of nearly one thousand galaxies, but the face-on galaxy NGC 4911 takes centre stage in this scene. Thick with gas and dust, its outermost skeletal arms sport joints of intense star-formation regions.
The gaseous coma. The coma, which produces the nebulous appearance of the cometary head, is a short-lived, rarefied, and dusty atmosphere escaping from the nucleus.
Named star in Coma Berenices: Diadem (α Com),
Adjoining constellations: Boötes, Canes Venatici, Leo, Ursa Major, Virgo.
Coma. A comet's atmosphere (composed of dust and/or various gases) surrounding its nucleus. The coma is rather tenuous (except very close to the nucleus), and stars can be occasionally easily seen through it, shining from behind.
Coma
Gas and dust pouring out from the nucleus forms a huge atmosphere around the nucleus. This is the bright core, called a coma, you can see when you observe a comet from the Earth. It is 100,000's of kilometers across.
Coma--A dense water cloud, made up of carbon dioxide and neutral gases, that comes off of the nucleus.
Hydrogen cloud--A huge section of hydrogen.
COMA
A hazy cloud which surrounds the nucleus of a comet.
COMET
Frozen masses of gas and dust which have a definite orbit through the solar system.
Coma
This refers to the blurring of objects at the edge of the field of view, most common in short focal ratio Newtonian telescopes (at f/10 and longer, Newtonians are very well corrected for coma).
Coma The head of a comet, usually the brightest part.
Comet Small icy body that orbits the Sun and produces tails of gas and dust when approaching the Sun.
coma An effect occurring during the formation of an off-axis image in a telescope. Stars whose light enters the telescope at a large angle acquire comet-like tails on their images. The brightest part of a comet, often referred to as the "head." ...
coma
the bright shroud of gas that surrounds a comet's nucleus
comet ...
Coma -- The cloud of diffuse material surrounding the nucleus of a comet.
Comets -- Small bodies composed of ice and rock in various orbits about the sun.
CRAF -- Comet Rendezvous / Asteroid Flyby mission, cancelled.
Coma
a spherical cloud of material surrounding the head of a comet. This material is mostly gas that the Sun has caused to boil off the comet's icy nucleus. This gas shines both by reflected sunlight and light emitted by excited molecules.
Coma (i) The matter surrounding the nucleus of a comet - it results from the evaporation of the nucleus. (ii) An optical aberration in which stellar images are fan-shaped, similar to comets.
Coma: A large cloud of dust and gas which escapes from the nucleus of an active comet.
Comet: A small body (a "dirty iceball", typically 1 km across, with dust and plasma tails) that circles the Sun with a highly elliptical orbit.
coma
The bright envelope of vaporized gases surrounding the nucleus of a comet.
...
Coma - A spherical gaseous region that surrounds the nucleus of a comet. The coma of a comet may be 100,000 kilometers (km) or more in diameter ...
coma: The glowing head of a comet.
comet: One of the small, icy bodies that orbit the sun and produce tails of gas and dust when they near the sun.
Coma (cometary). The cloud of gas and dust that makes up the head of a comet, the nucleus is at the centre.
Coma (optical). An optical defect where objects close to the edge of a field of view appear to be flared or fanned out.
COMA - Spherical envelope of gas and dust surrounding the nucleus of an active comet, created when the ambient heat causes the vaporization of comet material.
Coma
(a) An aberration common in traditional reflecting telescopes, in which off-axis rays of light striking different parts of the objective do not focus in the same image plane.
Coma- the dust and gas surrounding an active comet's nucleus
Comet- a small body composed of ices and dust which orbits the sun on an elongated path
Conjunction- the moment when two celestial objects lie closest together in the sky ...
Coma Berenices (Berenice's Hair)
Corona Saint Coma Berenike (Movie3), Coma Berenices Mei (Gigantomachia)
Origin of the constellation: 16th century, Tycho Brahe ...
The Coma
Comets can typically display a coma several thousand kilometers in diameter, with the size being dependent on the comet's distance from the sun and the size of the nucleus.
[edit] Coma and tail
Main article: Coma (cometary)
In the outer solar system, comets remain frozen and are extremely difficult or impossible to detect from Earth due to their small size.
coma - The roughly spherical blob of gas that surrounds the nucleus of a comet; it is about a million km across.
Coma Berenices, Berenice's Hair
You can find Coma Berenices -- and the Coma Berenices star cluster -- between these tail stars, too. The cluster stands about one-third the way from Denebola to Alkaid. (See star chart).
Coma - a variation of telescope magnification with radial zone on the mirror typically appears as a radial smudging of the images which gets worse at the edges of the field.
Coma Cluster
Such material is called "dark matter" and astronomers now believe that most of the material in the Universe is made of this stuff.
Coma Berenices
About this Java applet / Instructions Constellations is written using Java. You must have a Java enabled browser such as Netscape Navigator to be able to see this applet. Back to Constellations Home Page ...
Coma
A halo of evaporated gas and dust which forms when the comet approaches the inner solar system. The coma grows larger as the comet gets closer to the sun.
Meteorites ...
Coma Berenices is the home of M85, a lenticular galaxy that is part of the Virgo cluster of galaxies. It is very similar in appearance and brightness to M84. It was the site of a supernova in 1960 that reached a magnitude of 11.7.
Coma
carbon dioxide and other gases from the nucleus
in a dense cloud of water
Dust Tail ...
Coma
The cloud of gas and dust that forms around a comet's nucleus. This cloud is created when the solar wind strikes the surface of the nucleus.
Comet ...
coma - (n.)
The extended, glowing region that surrounds the nucleus of a comet.
comet - (n.) ...
Coma cluster
100
This means that H(Virgo) is about 60 km/s Mpc, but is this value globally applicable? Two major camps long existed: Sandage at 50 (the "long" distance scale) and de Vaucouleurs at 100 (the "short" scale).
The Coma Cluster of Galaxies
Click on image for full size
Courtesy of NASA.
When we look out into the Universe we observe some rather remarkable structure. We have seen that stars cluster together to form galaxies.
The coma is bright both because it reflects sunlight and because its gases are excited by sunlight and emit electromagnetic radiation.
The Coma Cluster of Galaxies ( O. Lopez-Cruz (INAOEP) et al., AURA, NOAO, NSF )
Regular Clusters ...
The coma and tail of a comet, indicated on a photograph of Halley's Comet taken on May 8, 1910. (Mt. Wilson Observatory photograph.) ...
See coma. [H76]
Head-Tail Galaxies
A class of relatively weak radio sources associated with clusters of galaxies and characterized by a high-brightness "head" close to the optical galaxy and a long low-brightness "tail". [H76]
HEAO ...
Capturing the Coma
This image shows comet Tempel 1, as seen by the Deep Impact spacecraft on June 21, 2005. It was taken using the clear filter of the spacecraft's medium resolution imager camera. The spacecraft was 11,564,081.
The cometary coma
Surrounding the nucleus is the bright coma. This is composed of gas and dust which has been expelled as the Sun evaporates the icy nucleus.
Hubble Falls Into Coma
Rate these videos or search for more
Search over 100 encyclopedias and dictionaries: ...
The Coma Cluster of galaxies. This picture shows hundreds of galaxies. Nearly every object in this picture is a galaxy - only a few of the objects are stars located in our own galaxy. This is clearly a rich cluster.
degree of condensation (DC) (Comet Glossary - JPL) DC is an indicator of how much the surface brightness of the coma increases toward the center of the coma. As the DC increases, the coma size usually decreses and becomes more sharply defined.
1933 - Fritz Zwicky applies the virial theorem to the Coma cluster and obtains evidence for unseen mass,
1936 - Edwin Hubble introduces the spiral, barred spiral, elliptical, and irregular galaxy classifications, ...
Coma - The region around the head of a comet.
Comet - A object orbiting the sun that when it gets close to the sun shows a coma and may show a tail.
 See also: Light, Sun, Earth, Solar, Orbit
|
