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Abell 520: a system where at least two massive galaxy clusters have collided This multi-wavelength image shows the chaotic aftermath of the collision of at least two galaxy clusters, some of the most massive objects in the Universe.High Resolution Images: format jpg (~0.5MB) or tif (~4.2MB)
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A closer look at the dark matter distribution
Credit: X-ray:
NASA/CXC/UVic./A.Mahdavi et al. Optical/Lensing: CFHT/UVic./A.Mahdavi
et al.
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A peculiar dark matter distribution indeed!
In this image of the "Bullet Cluster", known
as 1E
0657-56,
the hot gas is slowed down during the collision but the
galaxies
and dark matter (in blue) appear to continue on unimpeded, unlike in
Abell 520. 1E 0657-56
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CFHT - The telescope with MegaPrime/MegaCam
The Canada-France-Hawaii telescope structure is based on an equatorial
mount design, with one of the axis of rotation set parallel to the axis
of the Earth¹s rotation. The mirror cell (the white circular
structure
at the bottom of the telescope, seen just above the person giving the
scale
on this photograph) holds and protects the most precious element: the
3.6-meter
diameter mirror. © Canada-France-Hawaii
Telescope Corporation 2006
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The MegaCam
CCD mosaic At the focal plane of MeagCam seen in this photograph, there are 40 CCDs. Each of them, known as the 'e2v 'CCD42-90'', account for more than 9.5 megapixels. 36 of them are used to image the sky, bringing the total number of pixels for the MegaCam mosaic to a staggering 340 million! Want to know more about MegaPrime/MegaCam? You can go here (first light of the camera) or here for more technical information. Various resolution downloads: © Canada-France-Hawaii
Telescope Corporation 2006
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All images on this page are to be used
exclusively for
the purpose of media announcements
related to the "
Dark matter mystery
deepens in cosmic "train wreck" (August 2007)" press
release.
For any other use, please seek authorization from CFHT's PR
officer .