Not, absolutely! The first ancient Greek works which dealt with the constellations were books of star myths. The oldest of these was a poem composed by Hesiod in the C8th BC, of which only fragments survive.
The most complete extant works dealing with the mythic origins of the constellations are by the Hellenstic writer termed pseudo-Eratosthenes and an early Roman writer styled pseudo-Hyginus. Each of these drew extensively from the writings of older sources (Hesiod and his successors) and provide a clear overview of the stories that lay behind the star groups we are familiar with today.
A galaxy is a massive, gravitationally bound system that consists of stars, an interstellar medium of gas and dust, and dark matter. Typical galaxies range from dwarfs with as few as ten million[1] (107) stars up to giants with one trillion[2] (1012) stars, all orbiting a common center of gravity. Galaxies can also contain a large number of multiple star systems and star clusters as well as various types of interstellar clouds.
2007-03-01 12:51:42
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answer #1
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answered by Genio 5
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Galaxies are 100s of billions of stars held together by gravity, sometimes in a beautiful spiral shape. Constellations are a few stars that make a pattern (Like the big dipper), and they are all in our galaxy (the milky way). So, they are alike because they are both made of stars.
2007-03-01 12:46:09
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answer #2
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answered by Anonymous
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properly, Galaxies are in many circumstances extra effective then constellations yet they're the two nonetheless extensive. Galaxies carry billions of stars all orbiting around it rather is center and constellations are a team of a few stars. Like Orion's Belt that's merely 3 Stars. there is one among those extensive area between each action picture star in a constellation and that's the reason I stated that Galaxies are in many circumstances extra effective. in case you incorporate the area between each action picture star in a constellation to incorporate in it rather is diameter then they may be extra effective then a Galaxy if their stars weren't from the comparable galaxy. :)
2016-12-18 13:22:11
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answer #3
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answered by hogans 3
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Constellations are groups of stars that make "pictures" in the sky from our meager perspective in one arm of our galaxy. A galaxy is a huge grouping of stars and planets and moons and (?)life. I think you are comparing apples and oranges.
2007-03-01 12:49:38
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answer #4
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answered by damndirtyape212 5
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Spiral
Spiral galaxies usually consist of two major components: A flat, large disk which often contains a lot of interstellar matter (visible sometimes as reddish diffuse emission nebulae, or as dark dust clouds) and young (open) star clusters and associations, which have emerged from them (recognizable from the blueish light of their hottest, short-living, most massive stars), often arranged in conspicuous and striking spiral patterns and/or bar structures, and an ellipsoidally formed bulge component, consisting of an old stellar population without interstellar matter, and often associated with globular clusters. The young stars in the disk are classified as stellar population I, the old bulge stars as population II. The luminosity and mass relation of these components seem to vary in a wide range, giving rise to a classification scheme. The pattern structures in the disk are most probably transient phenomena only, caused by gravitational interaction with neighboring galaxies.
Our sun is one of several 100 billion stars in a spiral galaxy, the Milky Way.
Lenticular (S0)
These are, in short, "spiral galaxies without spiral structure", i.e. smooth disk galaxies, where stellar formation has stopped long ago, because the interstellar matter was used up. Therefore, they consist of old population II stars only, or at least chiefly. From their appearance and stellar contents, they can often hardly be distinguished from ellipticals observationally.
Elliptical
Elliptical galaxies are actually of ellipsoidal shape, and it is now quite safe from observation that they are usually triaxial (cosmic footballs, as Paul Murdin, David Allen, and David Malin put it). They have little or no global angular momentum, i.e. do not rotate as a whole (of course, the stars still orbit the centers of these galaxies, but the orbits are statistically oriented so that only little net orbital angular momentum sums up). Normally, elliptical galaxies contain very little or no interstellar matter, and consist of old population II stars only: They appear like luminous bulges of spirals, without a disk component.
However, for some ellipticals, small disk components have been discovered, so that they may be representatives of one end of a common scheme of galaxy forms which includes the disk galaxies.
Irregular
Often due to distortion by the gravitation of their intergalactic neighbors, these galaxies do not fit well into the scheme of disks and ellipsoids, but exhibit peculiar shapes. A subclass of distorted disks is however frequently occuring.
The constellations are totally imaginary things that poets, farmers and astronomers have made up over the past 6,000 years (and probably even more!). The real purpose for the constellations is to help us tell which stars are which, nothing more. On a really dark night, you can see about 1000 to 1500 stars. Trying to tell which is which is hard. The constellations help by breaking up the sky into more managable bits. They are used as mnemonics, or memory aids. For example, if you spot three bright stars in a row in the winter evening, you might realize, "Oh! That's part of Orion!" Suddenly, the rest of the constellation falls into place and you can declare: "There's Betelgeuse in Orion's left shoulder and Rigel is his foot." And once you recognize Orion, you can remember that Orion's Hunting Dogs are always nearby. Then you might recognize the two bright stars in the upper and lower left of the photograph as Procyon in Canis Minor and Sirius in Canis Major, respectively.
2007-03-01 12:48:52
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answer #5
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answered by Anonymous
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They're not.
Constellations = stars that make a figure or pattern. Not usually clustered.
Galaxies = Many stars and hold planets.
2007-03-01 12:48:12
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answer #6
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answered by Cerantine 3
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People are so confused about astronomy.
galaxies are gigantic collections of billions of stars
constellations are a figment of some ancient people's imaginations and nothing more than when you see faces or castles in the clouds. The stars are not really connected with each other.
You need to read a bit.
2007-03-01 14:03:39
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answer #7
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answered by nick s 6
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i think constellations are in galaxies
2007-03-01 12:42:16
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answer #8
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answered by ashley_tisdale2006 2
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Alike?
Both are composed of stars.
More different than alike, though.
2007-03-01 12:43:16
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answer #9
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answered by ecolink 7
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To quote 2010 A space odessey.....'there full of stars'......
2007-03-01 12:42:28
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answer #10
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answered by Anonymous
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