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SES4U: Earth and Space Science, Grade 12, University Preparation Unit 1: Science of the Universe Activity 5: Big Bang and Galaxies Galaxy Hunt (adapted from NASA’s Hidden Lives of Galaxies) 1. Complete the following chart describing the properties of the different galaxies. (/15) Spiral/Barred Spiral S, SB Shape and Structural Properties Stellar Content Gas and Dust Star Formation Stellar Motion Elliptical E Irregular Irr 2. The galaxy we live in is called the Milky Way. Using the Internet or other resources, research answers to the following questions. a) What is the diameter of the Milky Way? (/1) b) Draw and label a diagram (arms) of the Milky Way. Locate the sun on the diagram. (/5) c) How old is the Milky Way? (/1) d) Name the closest galaxy. How far away is it? (/1) 3. Classify the following galaxies. (/10) Galaxy Andromeda M84, NG4374 NGC2997 NGC5383 Large Magellanic Image Scheme Spiral Classification Sb NGC4622 M83 Centaurus A M59, NGC4621 NGC1365 4. The following Hubble Deep Field image illustrates the vast number of galaxies located in the universe. Draw lines to and identify the shape of 10 different galaxies in the image: (/10) Credit: Robert Williams and the Hubble Deep Field Team