Science Astronomy

Roman","serif"; font-size: 14.0pt; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-TW; mso-no-proof: yes;”>What’s Way Out There?
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Roman","serif"; font-size: 12.0pt;”>Big Idea:
Roman","serif"; font-size: 12.0pt;”> The Hubble Space Telescope image Hubble Ultra Deep Field shows a variety of objects in the very distant Universe that can be systematically and scientifically counted, organized, and classified.

Roman","serif"; font-size: 12.0pt;”>Computer Setup and/or Materials Needed
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Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman";”>a)     

Roman","serif"; font-size: 12.0pt;”>Access to the image at:  http:// www.spacetelescope.org/images/heic0406a/

Roman","serif"; font-size: 12.0pt;”>That originated from http://www.spacetelescope.org/news/html/heic0406.html


Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman";”>b)     

Roman","serif"; font-size: 12.0pt;”>Access to the SkyWalker website at: http://www.aip.de/groups/galaxies/sw/udf/swudfV1.0.html


Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman";”>c)     

Roman","serif"; font-size: 12.0pt;”>Note:  There is no expectation that students have studied galaxies prior to completing this research project.








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Roman","serif"; font-size: 12.0pt;”>Phase I:  Exploration


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Roman","serif"; font-size: 12.0pt;”>Access the online Hubble Space Telescope Image at http:// www.spacetelescope.org/images/heic0406a/ you might be able to make it larger and smaller by left clicking on the image with your mouse.  Most of these objects are galaxies far, far from Earth.  However, a few objects are nearby stars, as indicated by four points on the image, like shown at left. 

Roman","serif"; font-size: 12.0pt;”>How many stars can you find?


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Roman","serif"; font-size: 12.0pt;”>2.  Again, most of these objects are not individual stars, but actually distant galaxies—isolated collections of millions or billions of stars that look like a tiny dot or cloud.  Determine how many galaxies are found in the image.  One strategy to count the number of galaxies in the image is to just count the number of objects in ¼ of the image (the bottom left corner for example) and then multiply the number of galaxies times four to get the total number.

Roman","serif"; font-size: 12.0pt;”>            Total number of galaxies in this image? ___________________

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Roman","serif"; font-size: 12.0pt;”>Some of the galaxies are orange-red in color, while others are white, and others are blue.  What is the most common color of galaxy in the image?  Precisely explain how you determined this.


Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman";”>4)     

Roman","serif"; font-size: 12.0pt;”>If we assume that all of the galaxies in this image have the same diameter, the ones that are close appear larger and the ones that are more distant appear smaller.  Are most of the galaxies in this image relatively near or relatively far?  What is your evidence?

Roman","serif"; font-size: 12.0pt;”>Phase II – Does the Evidence Match a Given Conclusion?


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Roman","serif"; font-size: 12.0pt;”>Access the interactive Ultra Hubble Deep Field site through the the SkyWalkerwebsite at: http://www.aip.de/groups/galaxies/sw/udf/swudfV1.0.html

Roman","serif"; font-size: 12.0pt;”>The green circle in the top left hand corner is a sort of magnifying glass that you can drag around that will let you look at close up portions of the Hubble Ultra Deep Field.  Note that the picture is about 8 green circles wide and 10 green circles tall, for a total of about 80 green circles over the whole image.

Roman","serif"; font-size: 12.0pt;”>Make rough sketches of the five closest galaxies you can find in the image.




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Click here for more on this paper.

Roman","serif"; font-size: 12.0pt;”>If a fellow student proposed a generalization that nearby galaxies are equally split between circular-round and elongated spiral shapes, would you agree, disagree with the generalization based on the evidence you collected?  Explain your reasoning and provide specific evidence either from the above tasks or from new evidence you yourself generate using the SkyWalker Web Site.

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Roman","serif"; font-size: 12.0pt;”>Phase III – What Conclusions Can You Draw From This Evidence?

Roman","serif"; font-size: 12.0pt;”>The Hubble Ultra Deep Field is one of most important images in astronomy because it shows some of the most distant galaxies in the Universe.  What conclusions and generalizations can you make from the following data collected by a student by randomly positioning the green circle in an effort to determine WHAT IS THE GENERAL DISTRIBUTION OF GALAXY COLORS?  Explain your reasoning and provide the specific evidence you are using, with sketches or pie charts or graphs if necessary, to support your reasoning.

GREEN CIRCLE SAMPLE NUMBER

NUMBER OF RED-ORANGE GALAXIES

NUMBER OF BLUE-WHITE GALAXIES

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