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, star, clusters, stars, cluster":
... moons within the double-binary Cyrannus star cluster, which are the site of some human habitation ... 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 are truly ... more detail, 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 star cluster ...
... 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 ... The descendants of Genghis Khan or one of his ancestors represents a famous star cluster that can be dated back to the time of Genghis Khan ...
... 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 ... Clusters are also a crucial step in determining the distance scale of the universe ...
... 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 ...
... 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 ... have been used to establish a distance to the cluster's center of ~86 pc ...
Famous quotes containing the words cluster and/or star:
“Next week Reagan will probably announce that American scientists have discovered that the entire U.S. agricultural surplus can be compacted into a giant tomato one thousand miles across, which will be suspended above the Kremlin from a cluster of U.S. satellites flying in geosynchronous orbit. At the first sign of trouble the satellites will drop the tomato on the Kremlin, drowning the fractious Muscovites in ketchup.”
—Alexander Cockburn (b. 1941)
“I would that we were, my beloved, white birds on the foam of the sea!
We tire of the flame of the meteor, before it can fade and flee;
And the flame of the blue star of twilight, hung low on the rim of the sky,
Has awaked in our hearts, my beloved, a sadness that may not die.”
—William Butler Yeats (18651939)