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Galaxy Resarch Project

By Yulissa Mendez

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Galaxy Resarch Project

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  1. Galaxy Research Project By Yulissa Mendez

  2. What is a galaxy? A galaxy is an enormous collection of a few million to trillions of stars, gas, and dust held together by gravity located in space. They may be several thousand to hundreds of thousands of light-years across.

  3. How are galaxies formed? Galaxies are formed in two ways: Spiral galaxies, Elliptical galaxies, and as Irregular galaxies. Spiral galaxies are disk shaped assemblages with curvy, dusty arms. Elliptical galaxies are formed as a result of a merger of two disk galaxies. Irregular galaxies have some structure, usually in the form of a remnant spiral shape.

  4. Parts of a galaxy

  5. Do galaxies have a life cycle? It is true that galaxies grow and evolve, but they don’t have the same kind of life cycle as stars do. In the early universe, galaxies were formed in tiny variations in space. As they began to collapse, their matter spun faster flattening them into the shapes they are seen now, discs.

  6. Life cycle of galaxy

  7. Can galaxies collide? Yes, indeed they can. When two or more galaxies are close enough to each other, gravitational forces will pull the galaxies toward each other. Galaxies that pass through each other are known as pairs or a companion to the other. When they collide, they experience a gravitational pull which distorts their shape and can pull material from one galaxy to the other. The Cartwheel Stephan's Quintet The Antennae Two galaxies merging together. The birth of over 1000 clusters of young stars can be seen. A smaller galaxy has passed through the Cartwheel. A "ripple" of star formation resulted from the collision. The area is filled with stars and gas ripped from the galaxies, as well as new clusters of stars that formed from the interaction.

  8. What we look for When scientists try to study these distant galaxies, they look at many properties of each galaxy such as size, shape, brightness, color, amount of star formation, and distance from Earth. This info helps astronomers to determine how galaxies form and evolve.

  9. What is our galaxy? • Our galaxy is the Milky Way galaxy. When you look at the stars during nighttime and the sun during the day, they all belong to the Milky Way. It is 100,000–120,000 light-yearsaway. Our Milky Way galaxy from Earth.

  10. Solar System Universe Galaxy (Milky Way)

  11. So, why do we study galaxies? By studying other galaxies, astronomers learn more about the Milky Way, the galaxy that contains our solar system. Answers to such questions as "Do all galaxies have the same shape?," "Are all galaxies the same size?," "Do they all have the same number of stars?," and "How and when did galaxies form?" help astronomers learn about the history of the universe. Galaxies are visible to vast distances, and trace the structure of the visible universe with their collections of billions of stars, gas, and dust.

  12. Resources • "Amazing Space- Q&A: Galaxies, Pg. 1 of 5." Amazing Space- Q&A: Galaxies, Pg. 1 of 5. N.p., n.d. Web. 10 Sept. 2012. <http://amazing-space.stsci.edu/resources/qa/galaxies.php.p=Astronomy basics@,eds,astronomy-basics.php>. • "Astronomical Society of the Pacific." Astronomical Society of the Pacific. N.p., n.d. Web. 10 Sept. 2012. <http://www.astrosociety.org/>. • "Astronomy Picture of the Day." Astronomy Picture of the Day. N.p., n.d. Web. 8 Sept. 2012. <http://apod.nasa.gov/>. • "Galaxies - NASA Science." Galaxies - NASA Science. N.p., n.d. Web. 8 Sept. 2012. <http://science.nasa.gov/astrophysics/focus-areas/what-are-galaxies/>. • "Galaxies." National Geographic. N.p., n.d. Web. 8 Sept. 2012. <http://science.nationalgeographic.com/science/space/universe/galaxies-article/>.

  13. "HubbleSite - Out of the Ordinary...out of This World." HubbleSite - Out of the Ordinary...out of This World.N.p., n.d. Web. 8 Sept. 2012. <http://hubblesite.org/>. • "Infrared Processing and Analysis Center." Infrared Processing and Analysis Center. N.p., n.d. Web. 8 Sept. 2012. <http://www.ipac.caltech.edu/>. • Risa H. Wechsler, Risa H. "Risa H. Wechsler." Risa H. Wechsler. N.p., n.d. Web. 10 Sept. 2012. <http://risa.stanford.edu/>. • "Welcome to Ask an Astronomer at Cornell University." Curious About Astronomy? Ask an Astronomer. N.p., n.d. Web. 8 Sept. 2012. <http://curious.astro.cornell.edu/>. • "Www.atlantidea.org." Www.atlantidea.org. N.p., n.d. Web. 10 Sept. 2012. <http://www.atlantidea.org/>.

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