Examples of using Galaxy clusters in English and their translations into Hebrew
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A supercluster is a grouping of galaxies and galaxy clusters.
Since galaxy clusters are representative slices of the universe, scaled-down versions.
The entire superclusterconsists of approximately 300 to 500 known galaxy clusters and groups.
And as laboratories, to describe galaxy clusters is to describe the experiments that you can do with them.
Galaxy clusters are accumulations of thousands of galaxies, held together by their own gravity.
To answer that question, I'm going to have to ask another one, which is,what happens when galaxy clusters collide?
So these galaxy clusters-- we take a snapshot now, we take a snapshot in a decade, it will look identical.
The region is so massive and has a gravitational pull so strong,that it is pulling entire galaxy clusters toward it!
I began by talking about how galaxy clusters are useful, and I have given some reasons, but what is their use really?
Radek Wojtak, together with colleagues Steen Hansen and Jens Hjorth,has analysed measurements of light from galaxies in approximately 8,000 galaxy clusters.
Also known as Abell 1060,the Hydra galaxy cluster is one of three large galaxy clusters within 200 million light-years of the Milky Way.
And so by understanding how fast the galaxy clusters form and clump together, that tells us about Dark Matter but also about how much Dark Energy was pushing it apart at the same time.
The most serious problem facing Milgrom's law is that it cannot completely eliminate the need for darkmatter in all astrophysical systems: galaxy clusters show a residual mass discrepancy even when analysed using MOND.
The reason why galaxy clusters can teach us about dark matter,the reason why galaxy clusters can teach us about the physics of the very small, is precisely because they are so very big.
A combination of observations and theory suggest that the first quasars and galaxies formed about a billion years after the Big Bang, and since then largerstructures have been forming, such as galaxy clusters.
The 2006 observation of a pair of colliding galaxy clusters known as the"Bullet Cluster", poses a significant challenge for all theories proposing a modified gravity solution to the missing mass problem, including MOND.
For example, it has been claimed that MOND offers a poor fit tothe velocity dispersion profile of globular clusters and the temperature profile of galaxy clusters, that different values of a0 are required for agreement with different galaxies' rotation curves, and that MOND is naturally unsuited to forming the basis of a theory of cosmology.
Now, by showing you some of these images, I hope that you will quickly see that galaxy clusters are these beautiful objects, but more than that,I think galaxy clusters are mysterious, they are surprising, and they're useful.
Other explanations of dark energy, called phantom energytheories, suggest that ultimately galaxy clusters, stars, planets, atoms, nuclei, and matter itself will be torn apart by the ever-increasing expansion in a so-called Big Rip.
Galaxy cluster Abell 370 and beyond.
ESO 137-001 is moving through a galaxy cluster called Abell 3627.
They lie some 450 million light-years away in the Hercules Galaxy Cluster.
Scattered toward the lower left are members of galaxy cluster Abell 347.
This image of galaxy cluster Abell 2744, also called Pandora's Cluster, was taken by the Spitzer Space Telescope.
In fact, the galaxy cluster is difficult to appreciateall at once because it covers such a large area on the sky.
Okay, if I take an image of a galaxy cluster, and I subtract away all of the starlight, what I'm left with is this big, blue blob.
Previously, the redshift record for a galaxy cluster was about 1.5, corresponding to about nine billion light years distant.
One galaxy cluster is distorted by the shock wave into a bullet shape and gives the event its name- the Bullet Cluster collision.
This spectacular photo of galaxy cluster CL0024+1654 from the Hubble Space Telescope was taken in November 2004.