Mt. San Jacinto CollegeASTR 101Lab 11/29, PROPERTIES OF GALAXIES ALL ANSWERS CORRECT

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Chapter08 Properties of Galaxies Michaela Hughes 11/29/18 Grouping Galaxies Based on Appearance 1. When you have sorted the galaxies to your satisfaction, save a JPG-format copy of the mosaic an... d add it to your lab report here. 2. Add a detailed explanation which describes the key properties of the galaxies assigned to each row of your mosaic (such as “Row #1: Galaxies have a uniform golden color, no clear features or substructures, and elliptical shapes.”). If there were particular cases which you found most perplexing (such as a galaxy that seemed to belong equally well to two rows), make a note of them as well. (For example, “The last galaxy on the right in row #2 could have gone in row #3 as well, if I prioritized shape over color.”) Row One: Possess shapes similar to an ellipse with hints of blue and orange. Row Two+Three: Irregular like objects that have not yet fully formed into a galaxy with both blue and orange. Possess shapes similar to a sphere with a bold orange color. (The last galaxy in this row could have also gone in Row One but its shape dominated its color.) Galaxy Morphology Questions 1. A galaxy emitting lots of blue light must contain many hot, high mass short lived stars. The stellar classification of these blue stars is O and B / A. 2. Galaxies which appear more disturbed tend to have higher asymmetry indices, and bluer colors. 3. Elliptical galaxies tend to be redder, less massive, and contain less gas than spiral galaxies. Their concentration indices are lower, while their asymmetry indices are higher. 4. The Milky Way is a spiral galaxy, with a subclassifi [Show More]

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