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This section contains words approx. Nearly all the matter in the universe is concentrated in galaxies. A galaxy is a gigantic mass of stars held together by gravity.
The largest contain millions of stars. The smallest have just a few million, but even small galaxies are so big that light takes thousands of years to cross them. Despite having so much matter, galaxies are mostly empty space, with vast distances between each star.
Our sun and all the stars Essay galaxy can see with the naked eye belong to just one galaxy - the Milky Way. Beyond this lie billions of galaxies stretching as far into space as astronomers can see. Elliptical Galaxies Most galaxies are egg-shaped elliptical.
There galaxies are made up of masses of old, red stars that all formed around the Essay galaxy time. Elliptical galaxies have no gas for making new stars.
The elliptical galaxy M87 left is the largest galaxy known. It contains 3 million million stars - 15 times as many as our Milky Way.
Hidden in its centre is a massive black hole. Spiral Galaxies The most spectacular galaxies are spiral. These spin around like giant whirlpools, spreading their stars into graceful trailing arms. The oldest stars are located in a dense central hub.
The spiral arms contain young stars, pink nebulas, and dark lanes of gas and dust. Spiral galaxies are disk-shaped, so they appear flat if we see them from the side.
Our Milky Way is a spiral galaxy. Irregular Galaxies Galaxies with no recognizable shape are called irregular. They are usually small, with lots of young stars and bright gas clouds where new stars are forming. A typical example is the Large Magellanic Cloud right. Atlight years away, it is one of the closest galaxies and is visible to the naked eye as a pale smudge.
It has only 10 billion stars - our Milky Way has 20 times more. The large Magellanic Cloud is trapped by the Milky Way's gravity and orbits it every 6, million years.
Eventually, the Milky Way's gravity will tear it apart and the two galaxies will merge.
Cosmic Collision Most galaxies are incredibly far apart, but some get close enough to collide. This picture shows two spiral galaxies crashing into each other.
Their cores are orange. Individual stars do not collide, but dust clouds do, triggering a firestorm of star birth. The clusters of newborn stars in this picture look blue. The dark areas are dust clouds.The shapes of galaxies are influenced by their neighbors, and, often, galaxies collide.
The Milky Way is itself on a collision course with our nearest neighbor, the Andromeda galaxy. Even though it is the same age as the Milky Way, Hubble observations reveal that the stars in Andromeda's halo are much younger than those in the Milky Way.
The Milky Way Galaxy essays One of the most intriguing parts of the universe is our knowledge of the Milky Way.
The Milky Way Galaxy Essay Words | 8 Pages. system of millions in a galaxy of many more in the universe. A galaxy, also called a nebula, consists of billions of stars, interstellar gas, dust, and dark matter which are all bound to form a massive cloud in which we live in. Essay The Impact of the Andromeda-Milky Way Collision - The discovery of the vast universe, that exists outside our galaxy, began with Edwin Hubble’s discovery of a Cepheid Variable star in Andromeda, which he used to measure the distance to our neighbouring galaxy (Bennett et al. ). The Andromeda Galaxy and Her Brightest Star Essay - The Andromeda galaxy can be found to the north of the constellation bearing its name and appears as a “long, hazy patch” (Redd, ) in the sky with a visible fuzzy patch of stars stretching about “as long as the width of the full moon, half as wide and six times that length in fullness.
The hazy band of white light that one can often see in the night sky has been proven to be the home of our Solar System. There are so many different aspects that make the Milky Way so in. The Hitchhiker’s Guide to the Galaxy Questions and Answers.
The Question and Answer section for The Hitchhiker’s Guide to the Galaxy is a great resource to ask questions, find answers, and discuss the novel.
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Essay on Galaxies Galaxies are massive systems, which contain stars, gas and dust. These systems come in a variety of sizes, ranging from several million to several trillion stars. The Final Response of the Ultimate Hitchhiker's Guide to the Galaxy Essay hhikers Guide to the Galaxy Since the first book in the Hitchhiker's Guide to the Galaxy was only pages, I decided to read the first two books instead, so this second reader response is on the second book.