what is the difference between constellation and galaxy?
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A constellation is the imaginary pattern formed by a few stars. There are 81 known constellations. A galaxy is group of millions or even billions of stars, and it's planets and satellites and all of the stuff. Galaxies can be of these shapes- Spiral, barred spiral, elliptical and irregular.
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A constellation is merely a grouping of stars in the night sky given a social/cultural name. ... Constellations are the kinds of things which annoyed guys like Feynman. A nebula appears as a “dust” cloud in a small telescope (i.e., Galileo). In time, Messier, a comet hunter, kept running into these things.
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A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle.
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If stars never changed, then constellations wouldn't change. But the stars, including the Sun, travel in their own separate orbits through the Milky Way galaxy. The stars move along with fantastic speeds, but they are so far away that it takes a long time for their motion to be visible to us.
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Elliptical galaxies are characterized by several properties that make them distinct from other classes of galaxy. They are spherical or ovoid masses of stars, starved of star-making gases. The smallest known elliptical galaxy is about one-tenth the size of the Milky Way.
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A galaxy is a system of solar systems and other stars. ... The galaxy that contains the Earth and its solar system is called the Milky Way. This galaxy is thought to contain more than 200 billion different stars. Solar systems orbit around their galaxies just as planets orbit around their suns.
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No, not all stars are in a galaxy. They may have once belonged to a galaxy, but they are not a part of it any more. Some of these so-called "stellar outcasts" or "intergalactic stars" have actually been observed by NASA's Hubble Space Telescope. ... In other words, they are truly "intergalactic", or between galaxies.
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Galaxies are sprawling systems of dust, gas, dark matter, and anywhere from a million to a trillion stars that are held together by gravity. Nearly all large galaxies are thought to also contain supermassive black holes at their centers.
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Constellations are groups of stars in a particular pattern, as seen from earth. If you went to another planet, you wouldn't see the same constellations, in fact you would see totally different patterns and groups of stars. The star patterns that we see also doesn't mean that these are stars that are all in one place.
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A spiral galaxy consists of a spinning, flattened disk with arms that rotates very fast. An elliptical galaxy is the most common type of galaxy, has a roundish shape, and demonstrates little or no star formation. An irregular galaxy is a galaxy with no defined shape that has very young stars.
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What is the difference between stars and galaxies? ... A star is a small (relatively) ball of plasma that is generally sufficiently gravitationally compacted to initiate nuclear fusion in its core. A galaxy is about 10 billion or more of the above, all gravitationally bound to each other.
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While spiral galaxies are bright, elliptical galaxies are dim. Spiral galaxies are hotbeds of star formation, but elliptical galaxies aren't nearly as prolific because they contain less gas and dust, which means fewer new (and brighter) stars are born.
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In Hubble's scheme, which is based on the optical appearance of galaxy images on photographic plates, galaxies are divided into three general classes: ellipticals, spirals, and irregulars. Hubble subdivided these three classes into finer groups. Hubble's system of classification for galaxies.
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The most fundamental difference between the galaxy types is that spiral galaxies have a rotating disk of gas in which ongoing star formation can occur, while elliptical galaxies do not. Therefore, once gas is stripped out of a galaxy, it can no longer have a gaseous disk.
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All the stars we see in the night sky are in our own Milky Way Galaxy. Our galaxy is called the Milky Way because it appears as a milky band of light in the sky when you see it in a really dark area. ... Our Solar System is about 25,000 light years away from the center of our galaxy – we live in the suburbs of our galaxy.
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A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. We live on a planet called Earth that is part of our solar system. But where is our solar system? It's a small part of the Milky Way Galaxy.
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What is the difference between a galaxy and a star? While galaxies are massive systems made up of stars, dust, and gas clouds, stars are big, gaseous bodies that undergo nuclear reactions and emit light.