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Galaxy

Galaxy. By: Gurneet Gill and Charndeep Chattu. “Thoughts are like burning stars, and ideas, they flood, they stretch the universe.” ― Criss Jami. By the end of 10.2. You will learn…. The 3 types of Galaxies The 2 types of Clusters The differences in Galaxies

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Galaxy

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  1. Galaxy By: Gurneet Gill and Charndeep Chattu “Thoughts are like burning stars, and ideas, they flood, they stretch the universe.” ― Criss Jami

  2. By the end of 10.2 • You will learn…. • The 3 types of Galaxies • The 2 types of Clusters • The differences in Galaxies • About Edwin Hubble/ Hubble Space Telescope

  3. What’s a Galaxy? • A Galaxy contains gases, dust, and billions of stars that are held together by a gravitation attraction. • Earth is in the Milky Way which is a galaxy.

  4. Differences in Galaxies • Have different sizes, masses, colours, brightness, and speed of spin. • Number of stars, type of stars, and amount/type of gas and dust make up a galaxy. • Some grow larger while others stay small. • More a galaxy spins the flatter it will be.

  5. Types of Galaxies (cont.) • There are 3 common types of Galaxies: Spiral Galaxy • Has many long ‘arms’ spiraling out of a center core. • Center core is made of old stars. • From a side view spiral galaxies look flat and long. Spiral Galaxy Side View of Spiral Galaxy

  6. Types of Galaxies (cont.) Elliptical Galaxy • Range in shape from a perfect sphere to a stretched out sphere • Contain some of the oldest stars in the universe.

  7. Types of Galaxies Irregular Galaxy • Looks like a bunch of random stars close by. • Composed of new stars and adult stars.

  8. Clusters (cont.) • Many galaxies contain 2 types of distinct formations of stars: • Globular Cluster • made of about 1 million stars held together by gravity in a spherical shape.

  9. Clusters • Open Cluster: • Made of a few hundred-few tens of thousand of stars.

  10. Edwin Hubble • He was an astronomer. • In 1925 he thought he was looking at a bright nebula but he was actually looking at another galaxy. • Astronomers estimate there is about 125 billion. galaxies. Above is a nebula (made of dust and gas). Some nebulae is where stars are born.

  11. Hubble Space Telescope • Transmits images of galaxies to earth. Above is a picture taken by a Hubble telescope.

  12. Where are we in the Milky way? • We’re in the outer arms of a spiral galaxy. • Our solar system is approximately 28,000 light years away from the center. • A light year is the distance that light can travel in 1 year.

  13. 5 QUESTIONS (cont.) • 1. Is the picture above a …. Elliptical Galaxy Irregular Galaxy Spiral Galaxy

  14. 5 QUESTIONS (cont.) • 2. • Name the above picture .. • Globular cluster • Open cluster • Irregular galaxy

  15. 5 Questions • 3. Who is Edwin Hubble? • 4. Where is our Solar System located in the Milky Way? • 5. What is a light year? Define and give an example.

  16. Answers • 1. a. Elliptical galaxy • 2. b. Open Cluster • 3. Answers may vary. Edwin Hubble was an Astronomer who discovered there’s more than one galaxy. • 4. The solar system is located in the outer arms of a spiral galaxy. • 5. A light year is the distance light travels in one year. Ex: 28,000 light years.

  17. Bibliography • http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question19.html • http://www.spacetelescope.org/news/heic0602/ • http://www.goodreads.com/quotes/tag/galaxy • http://learnaboutastronomy.weebly.com/different-types-of-galaxies.html • http://www.eso.org/public/images/eso9845d/ • http://photo.net/photodb/photo?photo_id=5730534 • http://www.brighthub.com/science/space/articles/64966.aspx • http://apod.nasa.gov/apod/ap971114.html • http://en.wikipedia.org/wiki/Globular_cluster • http://apod.nasa.gov/apod/ap000112.html

  18. Bibliography (cont.) • http://en.wikipedia.org/wiki/File:Crab_Nebula.jpg • http://scienceworld.wolfram.com/biography/Hubble.html • http://novaonline.nvcc.edu/eli/evans/his135/Events/Sputnik57/chronology.html • http://www.universetoday.com/18256/where-is-the-sun/ • http://www.edwinhubble.com/ • BC Science 9 textbook and Workbook • THANK YOU!

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