Part 2: The Art of Cosmology

timer Asked: Sep 6th, 2017
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Question description

Cosmology is not just about taking beautiful pictures but it is about understanding how the Cosmos works! It is quite true in art, but even more so in Cosmology where a picture contains a thousand words. Or in the case of the first images taken by the COBE satellite of the Cosmic Microwave Background, over 20,000 research papers were written on the COBE results eventually culminating in over 200,000 research papers in the past several decades on all the Cosmic Microwave Background data! Without much further ado, here is the archive of Hubble’s pictures related to Cosmology:

For this part you will also choose 3 pictures of your liking, making sure to visit many of the 8 pages full of pictures! Like in Part 1, be sure to include the following:

I choose these three Abell 2744, A cosmic kaleidoscope, Astronomical you can Google them for the picture and cite purpose

1) The actual picture taken by Hubble properly cited

2) A physical description of the picture (What is the picture of? What is happening in the picture?)

3) To the best of your ability, what does this teach us about our universe? Cosmologists routinely study data from these types of objects to learn many of their physical parameters as well as test our current models against real data. The more data the better!

4) Your personal reaction to the picture. No need to record another’s reaction unless you really want to!

Tutor Answer

School: UIUC


Student Name:
X-rays, dark matter and galaxies in cluster Abell 2744

X-rays, dark matter and galaxies in cluster Abell 2744
The image is a combination of galaxy cluster Abell 2744 visible light and X-ray data
gathered from NASA’s Chandra X-ray Observatory as well as mathematical reconstruction of

dark matter location. The image was taken by the NASA Hubble Space Telescope as well as the
European Southern Observatory’s. The galaxies form the visible part of the spectrum. However,
the galaxies only give 5% of the cluster mass. The pink color shows intracluster gas that is
observable in X-ray emissions. The blue overlay in the image indicates a map of the cluster
mass. This map is recreated through the detailed analysis of how the cluster turns light emitted
from other galaxies in the far-away background (NASA et al., 2011). This light bending is
evidenced in the arc-like distortions portrayed in some parts of the image. Dark matter
constitutes 75% of the mass in the cluster and is revealed by the blue overlay.
This image is very educative and sheds a lot about our universe. It teaches us about the
existence of dark matter in indicated by the blue overlay. It also reveals the existence of other
clusters in space. T...

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Wow this is really good.... didn't expect it. Sweet!!!!

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