Galaxyzooorg and then click on story and also on

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Unformatted text preview: arize yourself with the main morphological types of galaxies, go to the Galaxy Zoo website at http://www.galaxyzoo.org and then click on “STORY” and also on “CLASSIFY”. You can review the description of galaxy morphologies. Also see the corresponding chapter in your textbook. Lab tasks. 1. What are the typical colors of elliptical and spiral galaxies? Discuss why these classes of galaxies tend to have the colors they have from what you know about the colors of stars. 2. Sketch three examples of various ellipticals and four examples of various spiral galaxies in your lab report indicating their type (spiral or ellipticals) and providing your best guess for their sub-type according to Hubble’s classification (e.g., E3, Sc, SBb, etc.). See the diagram at http://cas.sdss.org/dr3/en/proj/advanced/galaxies/tuningfork.asp 3 PHSC12000 V1.0 3 If you are curious and have time, explore the Galaxy Zoo website and help scientists in their exploration of galaxies by performing some simple classifications in their ’Classify Galaxies’ section. Homogeneity of galaxy distribution on the sky Start Google Earth and click on the “Saturn” icon on the top bar which switches to the Sky portion of Google Earth4 on the lab computer (or on your laptop after you install Google Sky and download the SDSS Galaxy Query kml plugin from the directory showed to you by TA and activate the SDSS Galaxy Photometric Layer by clicking on it, make sure the SDSS Galaxy Spectroscopic Layer is turned off (by unchecking it). Load the kml file Hubble lab random SDSS fields.kml. Find the corresponding folder in the Places window on the left hand side of the Sky window and click on + to see the folder contents (field 1, field 2, ..., field 10). These are ten random locations in the area of sky covered by the Sloan Digital Sky Survey away from the plane of the Milky Way and in areas devoid of very big bright galaxies and stars (which can block a significant part of the field of view). Double click on the field 1 field and the Sky will take you to the first field down to the zoom level at wh...
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This document was uploaded on 02/13/2014.

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