what is a galaxy
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- A galaxy is an enormous collection of gas, dust and billions of stars held together by gravity. One galaxy can have hundreds of billions of stars and be as large as 200,000 light years across.
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Andromeda Galaxy Facts The Andromeda Galaxy (M31) is the closest large galaxy to the Milky Way and is one of a few galaxies that can be seen unaided from the Earth.In approximately 4.5 billion years the Andromeda Galaxy and the Milky Way are expected to collide and the result will be a giant elliptical galaxy.he Andromeda Galaxy (M31) is the closest large galaxy to the Milky Way and is one of a few galaxies that can be seen unaided from the Earth.
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How many stars are in a galaxy? There are an estimated 100-300 billion galaxies in the observable universe. The number of stars in a galaxy depends on its size. The Milky Way Galaxy has between 200 and 400 billion stars. Dwarf galaxies may contain as few as 10 million stars, while the largest galaxies consist of more than a trillion. This is usually due to the merging of smaller galaxies into one big galaxy.
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Why Is Our Galaxy Called The Milky Way? The Milky Way is part of a collection of galaxies called the Local Group. We’re on a collision course with the most massive and largest member of that collection, which is the Andromeda Galaxy (also known as M31). The Milky Way is the second-largest galaxy, and the Triangulum Galaxy (M33) the third-largest.
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Equinox The word galaxy is derived from the Greek galaxias (γαλαξίας), literally milky, a reference to the Milky Way. Galaxies range in size from dwarfs with just a few billion (109) stars to giants with one hundred trillion (1014) stars, each orbiting its galaxy's center of mass.
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High School Earth Science/Galaxies The biggest groups of stars are called galaxies. Galaxies can contain anywhere from a few million stars to many billions of stars. Every star you can see in the sky is part of the Milky Way Galaxy, the galaxy we live in.ur solar system has only one star, the Sun. But many stars—in fact, more than half of the bright stars in our galaxy—are in systems of two or more stars. A system of two stars orbiting each other is called a binary star system. A system with more than two stars is called a multiple star system.
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Stars A galaxy contains not only stars, but clouds of gas and dust. These clouds are called nebulae, and it is in a nebula where stars are born. In the nebula is hydrogen gas which is pulled together by gravity and starts to spin faster.Over millions of years, more hydrogen gas is pulled into the spinning cloud. galaxy contains not only stars, but clouds of gas and dust. These clouds are called nebulae, and it is in a nebula where stars are born. In the nebula is hydrogen gas which is pulled together by gravity and starts to spin faster.
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General Astronomy/Print version The Milky Way Galaxy is about 100,000 Light Years across. Each light year is about 63,241 Astronomical Units. An Astronomical unit is the average distance between the Sun and …the Earth, or about 93 million miles. Based on that math we form an equation.
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Lesson: Beyond the Milky Way milky way: The spiral-shaped galaxy in which our solar system, Sun and planet reside. History of our galaxy's name: Before telescopes, the night sky stars looked like a blurry white streak across the sky. An ancient Greek myth called it a river of milk.. The ancient Romans called it a road made of milk..
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Galaxies Our galaxy, the Milky Way, is typical: it has hundreds of billions of stars, enough gas and dust to make billions more stars, and at least ten times as much dark matter as all the stars and gas put together. And it’s all held together by gravity. Like more than two-thirds of the known galaxies, the Milky Way has a spiral shape.
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The galaxy The galaxy, as it was commonly referred to, was one of the trillions of galaxies in the... The galaxy, as it was commonly referred to, was one of the trillions of galaxies in the universe. The galaxy was a vast composite of over 400 billion estimated stars and over 3.2 million habitable...
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galaxy any of a vast number of star systems held together by gravitational attraction in an asymmetric shape (an irregular galaxy) or, more usually, in a symmetrical shape (a regular galaxy), which is either a spiral or an ellipse Former names island universe, extragalactic nebula, related adjective galactic.
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Galaxy (UK TV channel) (December 2009). Galaxy was a satellite television channel focusing on general entertainment, one of the five channels run by British Satellite Broadcasting (BSB) and based at its Battersea Studios in the Marco Polo House Building.he station also broadcast children's programmes under the strand 'Galaxy Club', which featured home grown programming, mixed with imported cartoons and series such as the cartoons Denver, the Last Dinosaur, Spider-Man, Teenage Mutant Hero Turtles, and Underdog.
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What galaxy does the milky way belong to? The Milky Way is our galaxy. It is close to the Local Super Cluster of galaxies, Virgo 1. The Super Cluster is a giant area of many galaxies, that head toward each other, but… do not necessarily collide with each other.
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- The Andromeda Galaxy (=M 31): a large spiral galaxy (Sb) near the Milky Way. Note M 32 just above it and M 110 below it. Courtesy of Jason Ware. The Triangulum Galaxy (=M 33): a small spiral galaxy (Scd) in the Local Group.
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Equinox A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. The word galaxy is derived from the Greek galaxias (γαλαξίας), literally milky, a reference to the Milky Way. Galaxies range in size from dwarfs with just a few hundred million (108) stars to giants with one hundred trillion (1014) stars, each orbiting its galaxy's center of mass.
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- › earth science A galaxy is sometimes used to describe a gathering of famous people: a galaxy of Hollywood stars (Definition of “galaxy” from the Cambridge Academic Content Dictionary © Cambridge University Press)
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Old Stars, New Stars All stars are in galaxies in a universe of unimaginable dimensions. Our planet orbits a sun that is one of billions of stars in the Milky Way, a galaxy in a group of galaxies that occupies only about onemillionth of the observable universe. All galaxies are moving away from one another.
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How many stars are in a galaxy? The number of stars in a galaxy depends on its size. The Milky Way Galaxy has between 200 and 400 billion stars. Dwarf galaxies may contain as few as 10 million stars, while the largest galaxies consist of more than a trillion. This is usually due to the merging of smaller galaxies into one big galaxy.
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- A galaxy was a massive, gravitationally bound assemblage of stars, an interstellar medium of gas and dust, and an unknown type of dark matter. Typical galaxies contained ten million to one trillion (10 7 to 10 12) stars, all orbiting a common center of gravity.
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Galaxy Our own galaxy, the Milky Way, is a large disk-shaped barred-spiral galaxy about 30 kiloparsecs in diameter and a kiloparsec thick. It contains about two hundred billion (2×1011) stars and has a total mass of about six hundred billion (6×1011) times the mass of the Sun.
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Solar System, Galaxy, Universe: What's the Difference? Every spot and smudge in this image is a galaxy. Credit: NASA, ESA Many people are not clear about the difference between our Solar System, our Milky Way Galaxy, and the Universe. Let’s look at the basics. Our Solar System consists of our star, the Sun, and its orbiting planets (including Earth), along with numerous moons, asteroids, comet material, rocks, and dust. Our Sun is just one star among the hundreds of billions of stars in our Milky Way Galaxy. If we shrink the Sun down to smaller than a grain of sand, we can imagine our Solar System to be small enough to fit onto the palm of your hand. Pluto would orbit about an inch from the middle of your palm.
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Milky Way The Milky Way is a barred spiral galaxy that has a diameter usually considered to be roughly 100,000–120,000 light-years but may be 150,000–180,000 light-years. The Milky Way is estimated to contain 200–400 billion stars, although this number may be as high as one trillion.
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- The Andromeda Galaxy (/ ae æ n ˈ d r ɒ m ɨ d /) ə is a spiral galaxy approximately.2 5 million-light (years.2 × 4 10 19) km From earth in The andromeda. Constellation also known As messier, 31, m31 OR ngc, 224 it is often referred to as The Great Andromeda nebula in older. texts
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- How big is the Milky Way Galaxy? The Milky Way Galaxy is our home in the existing Univers, it is a barred spiral galaxy 100,000‐120,000 light-years in diameter containing 200‐400 billion stars and at least as many planets including our solar system.
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galaxy An assembly of brilliant, glamorous, or distinguished persons or things: a galaxy of theatrical performers. Origin of galaxy. Middle English galaxie the Milky Way from Late Latin galaxiās from Greek from gala galakt-milk; see melg-in Indo-European roots.