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galaxy cluster |
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galaxy cluster [′gal·ik·sē ‚kləs·tər] (astronomy) A collection of from two to several hundred galaxies which are much more densely distributed than the average density of galaxies in space. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The arrangement supports the bottom-up model, which holds that galaxies and galaxy clusters assemble from smaller building blocks. The observers focused on a galaxy cluster called 1E0657-56. Although no one knows what dark matter is made of, researchers suspect that it's responsible for pulling galaxies and galaxy clusters into the gargantuan, filamentary structures seen in the sky today. |
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