Star Cluster
Related Category: Astronomy: General
a group of stars near each other in space and resembling each other in certain characteristics that suggest a common origin for the group.
Star cluster
Globular Cluster M92 in the Hercules constellation.
Star clusters are groups of stars which are gravitationally bound.
Star Clusters
A star cluster is a group of stars that share a common origin and are gravitationally bound for some length of time. They are are particularly useful to astronomers as they provide a way to study and model stellar evolution and ages.
Star Clusters
A grouping of the same types of astronomical objects. For example, stars in the Milky Way can group together into open clusters or globular clusters.
star cluster
Home ... Science and Technology Astronomy and Space Exploration Astronomy: General ...
Essential reading Compare
side-by-side A Dictionary of Astronomy The Columbia Encyclopedia, Sixth Edition ...
Star clusters are groups of stars which are close together in space, rather than just accidentally lined up one behind the other. There are several different kinds.
Star Cluster
Associations have 10-100 stars (e.g., OB, T Tauri). have 105-106 , 75 in diameter. Open clusters have 100-1000 , 10-100 in diameter.
, , ...
Definition: star cluster: A bunch of stars (ranging in number from a few to hundreds of thousands) which are bound to each other by their mutual gravitational attraction.
Space Tragedies9 Planets in Nine DaysAstronomy 101
Related Articles ...
The core of star cluster NGC 3603 is revealed in this WFPC2 image taken in 2007, which was compared with an image taken ten years earlier to detect the motions of individual stars.
Identifying star clusters
The Pleiades, the Hyades and the Beehive cluster are all amazing in their own right but, to pose a straightfoward question: which is which?
Three galaxies, Two star clusters, one night
The Andromeda galaxy, Bode's nebula (actually a galaxy), and the beautiful Double Cluster in Perseus.
While observing, notice that the star cluster is flanked by two stars. Their names are Asellus Borealis and Asellus Australis, meaning the "Northern & Southern Donkeys." The northern donkey is the star at top.
star cluster A group of stars physically close together in space. star grain = star perforated grain. Stark effect The broadening or splitting of a spectral line observed when a luminous gas is acted upon by a strong electric field.
STAR CLUSTERS
Open clusters are found in the disk of the Galaxy, and therefore lie largely in the plane of the Milky Way.
star cluster A grouping of anywhere from a dozen to a million stars which formed at the same time from the same cloud of interstellar gas.
Star Cluster: A group of stars which are held together by their mutual gravitational attraction.
star cluster
A gathering of stars in a relatively small region, which are gravitationally bound to each other.
star party
A gathering of amateur astronomers at a dark site to observe the night sky with their telescopes.
star cluster
A bunch of stars (ranging in number from a few to hundreds of thousands) which are bound to each other by their mutual gravitational attraction.
Star Cluster
a large grouping of stars, from a few dozen to a few hundred thousand, that are bound together by their mutual gravitational attraction.
Star Cluster
A gravitationally bound aggregation of stars, smaller and less massive than galaxies.
Star Clusters and Their Ages
Clusters of stars are groups of stars, held together by their mutual graviational attraction. Astronomers classify three types of clusters: globular clusters, open clusters and associations.
Open Star Cluster
Open star clusters are groups of stars which formed from the same huge cloud of gas and dust.
Open star cluster M41 is the most promient deep sky object in Canis Major.
List of Constellations
Winter Sky ...
Open star cluster A loose association of stars numbering from a few dozen to hundreds.
Opposition When a celestial body is opposite the Sun in the sky.
Orbit The path followed by one body as it moves around another.
Open Star Cluster
A cluster of 10 to 10,000 stars with an open, transparent appearance. The stars are not tightly grouped. Usually relatively young and located in the disk of the galaxy.
Open Universe ...
Star clusters can include anywhere from a few dozen to a million stars in a region a few parsecs across.
Star Clusters
Overview
The dictionary definition of a cluster is simply a group of objects. A cluster of apples, for example, is just a group of apples. In astronomy, on the other hand, a cluster is used to refer to a grouping of stars.
Star clusters NGC 2244, NGC 2506, M 50
Meteor Shower: December Monocerids, Alpha Monocerids ...
Star Clusters : groups of the same age
Globular clusters : old, halo, metal poor
Open clusters : young, disk, metal rich
Cluster H-R diagrams : isochrones (same age)
Young cluster isochrones
Main Sequence Turn Off point (MSTO) ...
A star cluster (The Pleiades). © David Malin (AAO), ROE, UKS Telescope IsiLimela or the Pleiades were the 'digging stars', whose appearance in southern Africa warned of the coming need to begin hoeing the ground.
A star cluster containing 100,000 - 1 million stars in a sphere about 75 light years in diameter. Generally old, metal-poor, and found in the spherical component of the galaxy.
grating ...
Six star clusters reside within the constellation's borders. These are:
NGC4609, NGC4103, NGC4349, NGC4439, NGC4337, NGC4052.
Open Star Clusters @ SEDS Messier pages
A general overview of open clusters
Open and globular clusters overview
The moving cluster method
Open Clusters - Information and amateur observations ...
An open star cluster in the constellation of Taurus, the Pleiades is easy to see with the naked eye. Those with good eyesight can see six stars but binoculars reveal many more.
Ages for star clusters can be estimated by comparing the H-R diagram for the cluster with theoretical models of stellar evolution, and using this technique, ages for the Pleiades of between 75 and 150 million years have been estimated.
Pleiades (star cluster) - open cluster of stars in the constellation Taurus ...
Pleiades (star cluster)
File:Pleiades Lanoue.pngIn astronomy, the Pleiades are an open star cluster in the constellation of Taurus . It is among the nearest star clusters to Earth, and Randall Munroe's favorite astronomical object....
cluster ...
The super star clusters seen in starbursts, and often in merging systems, play an important role in sorting this out. Will they, or will they not, someday age to become what we recognize as a globular cluster? Evidence to this point is contradictory.
The Coma Star Cluster
Best seen in binoculars, the cluster fills the entire field of view: about 40 stars spread out over a five degree area.
Ages of star clusters and galaxies
The color can also be used to measure the age of a star or a group of stars in star clusters and galaxies.
NEBULAE & STAR CLUSTERS
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
entire Web this site ...
M13 globular star cluster
Gravitational field demonstrated
Self-gravitating system
A self-gravitating system is a system of masses kept together by mutual gravity. An example is a star.
Another name for an open star cluster. They are often termed Galactic Clusters because they are found mainly in the plane of our galaxy (The Milky Way).
The Serpens South star cluster is a densely populated area that contains about 50 young stars, 35 of which are only beginning to form. The cluster lies 848 light-years from Earth.
globular clusters (High Energy Astrophysics Dictionary- GSFC) Spherically symmetric star clusters, containing over 100,000 individual stars, which are in a roughly spherical distribution about the main hub of a galaxy.
Includes details of equipment used, solar system, planetary nebula, star clusters, and galaxies. Sea and Sky - The Sky Hall of Astronomers Profiles of prominent astronomers, astrophysicists, and mathematicians.
main sequence turnoff the mass of the most massive main sequence star remaining in a star cluster. Stars more massive than the turnoff have already evolved beyond the main sequence stage.
(b) A star cluster that packs hundreds of thousands of stars into a region only about a hundred light-years across. Bright globular clusters include Omega Centauri, 47 Tucanae, and M13. In the Milky Way, all globular clusters are old.
Star Clusters (Check the study guide for this lesson)
Stars are born in "families" called clusters. I'll teach you how clusters age and show you how to find several types of clusters in various stages of aging.
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 reason Messier compiled this catalogue was to save time while comet hunting.
On October 4, 2006, another team of astronomers announced the finding of evidence that Sol formed in a large open star cluster with hundreds to thousands of members.
It is important to make this distinction because later we shall consider groupings that are physical groupings, such as star clusters and binary star systems.
The Constellations of the Zodiac ...
Along its journey to Eros, NEAR snapped unique photos of Earth, the Moon, Comet Hyakutake, and the Beehive and Pleiades star clusters.
Despite its masculine connotations, the constellation is rich in female icons; both the Hyades and Pleiades star clusters are daughters of Atlas and both are important astronomically.
Brent Archinal (formerly of the U.S. Naval Observatory), an expert on open star clusters. Dr.
Even more famous than the Hyades is another star cluster in Taurus: the Pleiades, commonly known as the Seven Sisters. To a casual glance, the Pleiades cluster appears as a fuzzy patch like a swarm of flies over the back of the bull.
The evolution of a star cluster is shown. In the first H-R diagram (far left), the stars have just been formed. The high mass stars evolve faster, so they are on the Main Sequence (red line) before the low mass stars.
This stellar swarm is M80 (NGC 6093), one of the densest of the 147 known globular star clusters in the Milky Way galaxy.
I enjoy viewing the planets and other objects through my current telescope, but I really like to look at the various star clusters, nebulas and galaxies the sky has to offer.
One way to see more massive stars have shorter lives is to study the star clusters. As mentioned in Chapter 13, stars in clusters were born at the same time. Hence, they have the same age, but their masses are different.
 See also: Cluster, Star, Light, Telescope, Sky
|
