A globular cluster has between 1,000 and a million stars gravitationally bound.
Unfortunately, there are many types of nebula.
Each with a varying number of stars from 1 to many. It all depends on the size of the nebula and how many new stars have been formed.
In all likelihood, but not certain, a globular cluster will contain the most stars.
A galaxy.
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Constellation or "asterism". The difference is that "constellations" are officially recognized by the International Astronomical Union, while an "asterism" is any other pattern or grouping of stars.
globular cluster
globular cluster
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Globular ClusterA huge group of stars that are close together is a star cluster. With many more stars it is a galaxy.
Globular ClusterA huge group of stars that are close together is a star cluster. With many more stars it is a galaxy.
Astronomers believe the globular clusters are made of old stars because of the lack of heavy elements. The heavy element is very abundant in stars like our sun, so the theory is the globular cluster must be older and formed in a more primitive universe.
No, a globular cluster is a gravitationally bound cluster of stars withing a galaxy. A quasar is formed from a supermassive black hole pulling in huge quantities of matter, superheating it and producing enormous quantities of energy far more efficiently than any star or group of stars.
These are called Globular Clusters.They are not galaxies but instead are dense groups of stars that are part of a galaxy.Our Milky Way galaxy is estimated to have about 180 Globular Clusters in it. Many of them are near the center of our galaxy but some also orbit at the outer edges.For comparison, a Globular Cluster can contain 100's of thousands of stars and up to 1 million stars. Our Milky Way galaxy contains all those Globular Clusters plus over 100 billion more stars.
Galaxies are by far the largest. Galaxies contain millions to trillions of stars, each orbiting the galaxy's centre of mass. Our own Milky Way is an example of a galaxy, of which our sun is just one of 200 to 400 billion other stars. The Milky Way is estimated to be in the region of 100,000 to 120,000 light years across. Nebulae (the plural of nebula) are gas regions where stars are often formed. They exist within galaxies and are therefore much smaller. The famous Orion Nebula is estimated to be 24 light years across, while the larger Carina Nebula is in the region of 100 light years across. Both exist within the Milky Way. A globular star, or globular cluster, is a cluster of stars. There are around 150 to 158 such clusters known to exist in the Milky Way, with perhaps 20 more yet to be discovered. A neutron star is a stellar remnant, the result of a supernova (exploding star). They are much smaller than the original star would have been, but are incredibly dense and often rotate very rapidly, emitting electromagnetic radiation as pulsars.
There are two types of star clusters. Globular clusters are tight groups of hundreds of thousands of very old stars which are gravitationally bound, while open clusters, are more loosely clustered, generally containing less than a few hundred stars, and are usually very young.
The Eagle Nebula is a young open cluster of stars in the constellation Serpens. It is called this because it's shape looks like an eagle.It is well know because of the award winning photograph - Pillars of Creation.See related link for more information.