Star clusters or star clouds are groups of stars. Two types of star clusters can be distinguished: globular clusters are tight groups of hundreds of thousands of very old stars which are gravitationally bound, while open clusters, more loosely clustered groups of stars, generally contain fewer than a few hundred members, and are often very young. Open clusters become disrupted over time by the gravitational influence of giant molecular clouds as they move through the galaxy, but cluster members will continue to move in broadly the same direction through space even though they are no longer gravitationally bound; they are then known as a stellar association, sometimes also referred to as a moving group.
Star clusters visible to the naked eye include Pleiades, Hyades and the Beehive Cluster.
Other articles related to "star cluster, stars, cluster, star, clusters":
... The Coma Star Cluster in Coma Berenices, designated Melotte 111 after its entry in the catalogue of deep sky objects by P ... Melotte, is a small but nearby star cluster in our galaxy, containing about 40 brighter stars (magnitude 5 to 10) with a common proper motion ... and infrared color-magnitude diagram fitting have been used to establish a distance to the cluster's center of ~86 pc ...
... Y-DNA network analysis of Y-STR haplotypes showing a non-star cluster indicates Y-STR variability due to multiple founding individuals ... Analysis yielding a star cluster can be regarded as representing a population descended from a single ancestor ... Khan or one of his ancestors represents a famous star cluster that can be dated back to the time of Genghis Khan ...
... The Five Star Stories takes its name from the Joker Star Cluster where the stories take place ... The star cluster is made up of four stars Eastern, Western, Southern and Northern ... The "fifth star" is a large comet named Stant that passes through that sector of space every 1,500 years pulling with it its own collection of orbiting planets ...
... Stellar clusters are important in many areas of astronomy ... Because the stars were all born at roughly the same time, the different properties of all the stars in a cluster are a function only of mass, and so stellar evolution theories rely on observations of open and ... Clusters are also a crucial step in determining the distance scale of the universe ...
... marginally habitable planets or moons within the double-binary Cyrannus star cluster, which are the site of some human habitation ... colonies" is so low - 1.4 million, compared to the total 28.5 billion population of the star system as a whole - that they have little social or political significance, and ... stating that minor colonies were located on four planets or moons in the star cluster Minos - a moon of Tauron, located in Helios Alpha, and the largest moon in the entire ...
Famous quotes containing the words cluster and/or star:
“The power to guess the unseen from the seen, to trace the implications of things, to judge the whole piece by the pattern, the condition of feeling life in general so completely that you are well on your way to knowing any particular corner of itthis cluster of gifts may almost be said to constitute experience.”
—Henry James (18431916)
They sent a million here:
Here men were drunk like water, burnt like wood.
The fat of good
And evil, the breasts star of hope
Were rendered into soap.”
—Randall Jarrell (19141965)