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[DOC File]Universe, Galaxies, Solar System
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Our Galaxy, The Milky Way. The Milky Way is a (barred) spiral, 100,000 light years in diameter, containing some 200 billion stars (though composed primarily of dark matter), and is approximately 13 billion years old (based on the age of the oldest stars). The Sun is located near the outer edge, and is orbiting the galactic core at 220 km per ...
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How Many Galaxies Are There? - WorldAtlas
the Milky Way —is a . barred spiral. galaxy. The Milky Way is . 100,000 Light Years across. A . light year . is the . distance light travels . in a. year. Light years are units to measure things that are . very, very far away . like stars or galaxies. The Milky Way. is located in …
trillions of galaxies in the universe

[DOCX File]Properties of Galaxies
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Which galaxies are composed of older stars? 27: In a galaxy like the Milky Way, with both young and old stars, where are the youngest stars mostly located? 28: Are galaxies randomly distributed or are they too grouped in clusters like stars? 29: Our own galaxy, The Milky Way, is located in a cluster containing how many other galaxies?
galaxies in the universe

[DOCX File]Galaxies - Weebly
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Small Magellanic Cloud – An irregular galaxy of stars that is one of several in the Local Group of galaxies to which our own Milky Way belongs. Period-Luminosity Relation – principle that variable stars with longer periods will have a higher intrinsic brightness than stars with shorter periods.
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[DOC File]Discovering the Milky Way - NASA
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The Milky Way galaxy viewed at night from Death Valley California. The Milky Way is simply the common name for the galaxy that encompasses our solar system. It is a barred spiral galaxy that is part of the Local Group, a smaller group of 3 large and over 30 small galaxies, and is the second largest (after the Andromeda Galaxy M31) but perhaps ...
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[DOCX File]Chapter 1 The runaway galaxies
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4. Galaxy #2 is far less luminous than our Milky Way. How many galaxies of this luminosity would you need to match the light output of the Milky Way? Replace this text. 5. Notice how the light profile (the radial plot of counts) can be divided into. an inner region and an outer region (with a …
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[DOC File]Our Home 'The Milky way'
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The great debate: a universe with many galaxies? During the 18th and 19th centuries, it became clear that our sun is indeed one star in a great galaxy of stars across the sky known as the Milky Way. However, astronomers did not just observe stars and planets through their telescopes; fuzzy clouds of light known as the . distant nebulae
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[DOCX File]galaxy
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- The solar system is located in one of the spiral arms of the Milky Way on the edge of the galaxy. - The earth is one of the planets that rotate around the sun. The Earth. It is the planet of life. The universe: It is a wide and extended space that contains galaxies. The number of galaxies in the universe is about 100,000 million galaxies ...
how many galaxies in the universe

[DOC File]1: What are galaxies
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A cloud composed almost exclusively of hydrogen and helium, roughly 500 million light years diameter, collapsed over a time interval spanning hundreds of millions to billions of years, forming a denser core. For many galaxies, like the Milky Way, this would have begun shortly after the formation of the Universe, roughly13 billion years ago ...
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[DOC File]Laboratory Title: The Glittery Milky Way
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So what type of galaxy is the Milky Way? ~ The Milky Way galaxy is classified as a spiral galaxy (pictured below) 1. Spiral galaxies are disk shaped assemblages with curving, dusty arms. 2. Spiral galaxies are named for the (usually two armed) spiral structures that extend from the bulge into the disk. 3.
trillions of galaxies in the universe

How many galaxies in the milky way