Examples of using Open clusters in English and their translations into Vietnamese
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Open clusters are very important objects in the study of stellar evolution.
With an estimated age of about 3.6 billion years,it is one of the nearest old open clusters.
Partly because of their small total mass, open clusters have relatively poor gravitational cohesion.
Two Messier objects, M52(NGC 7654) and M103(NGC 581), arelocated in Cassiopeia; both are open clusters.
The most prominent open clusters such as the Pleiades have been known and recognized as groups of stars since antiquity.
The bulk of stars with more than half the mass of our sun form in groups,called open clusters.
More than 1,100 open clusters have been discovered within the Milky Way Galaxy, and many more are thought to exist.
The majority of stars with more than half of the mass of our Sun form in groups,called open clusters.
Only one association has been established between open clusters and nearby nebulae, the extremely distant nebula PHR 1315-6555[1][7].
Open clusters do not form in isolation but in complexes(Efremov 1978), within star forming regions.
But stars are born in very dusty places,which makes these Open Clusters difficult to find for most telescopes.
Open clusters generally survive for a few hundred million years, with the most massive ones surviving for a few billion years.
The majority of stars that weigh more than half as much as our nearest star, the Sun,are born in groups called‘Open Clusters'.
Hertzsprung-Russell diagram for two open clusters, M67 and NGC 188, showing color-magnitude data for two of the best-studied old open clusters.
The total mass of RSGC3 is estimated at 20 thousand solar masses,which makes it one of the most massive open clusters in the Galaxy.[1].
Consequently, open clusters tend to disperse after a relatively short time, typically some 10 million years, because of external gravitational influences amid other factors.
The mass of the open cluster is estimated at 10- 20 thousand solar masses,which makes it one of the most massive open clusters in the Galaxy.[1].
These include the Messier open clusters M52 and M103, the Owl Cluster(NGC 457), the White Rose Cluster(NGC 7789), and the open cluster NGC 663.
However, using a new telescope called the VISTA telescope, Professor Kurtev andother astronomers have discovered 96 new Open Clusters in our galaxy, the Milky Way, that had previously been hidden from view.
NGC 2451 is an open cluster in the Puppis constellation, probably discovered by Giovanni Battista Hodierna before 1654 and John Herschel in 1835.[1] In 1994, it was postulated that this was actually two open clusters that lie along the same line of sight.
The east side of the N11 complex is N11C(NGC 1769),an emission nebula containing at least two compact open clusters.[12] Outside the main"bubble" of N11 to the northeast is N11E, also known as NGC 1773, a small bright nebula containing several massive young stars.
NGC 752(Caldwell 28) is an open cluster with an apparent magnitude of 5.7, located at a distance of 1,300 light years from Earth.
(2006) found evidence for four open cluster complexes(OCCs) of different ages containing up to a few tens of clusters. .
NGC 1978(also known as ESO 85-SC90)is an elliptical shaped globular cluster or open cluster in the constellation Dorado constellation.
NGC 465 is an open cluster in the Magellanic Clouds.[1] Being part of the Tucana constellation, it was discovered by Scottish astronomer James Dunlop in 1826.[2].
NGC 1974(also known as NGC 1991 and ESO 85-SC89)is an open cluster associated with a emission nebula which is located in the Dorado constellation which is part of the Large Magellanic Cloud.
It is visible through 7x50 binoculars andit is considered the best open cluster for small telescopes in the constellation.[3] It is located 5° WNW of delta Monocerotis and 2° SSE of 18 Monocerotis.
It is a massive open cluster, with more than 500 solar masses.[4] The cluster is in relation with the giant nebula Sh2-310, that lies at the same distance.[2].
Open Cluster NGC 2175(also known as OCL 476 or Cr 84) is an open cluster in the Orion constellation, embedded in a diffusion nebula.