Recently I read an article that claimed that when you stand still you are actually moving 600km / s if your frame of reference is our local galactic cluster.
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Collisions or mergers of galactic clusters are fairly rare events, and the most powerful ones have been hard to observe because they lie in the plane of the Milky Way.
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Out there, some 800 million light-years from Earth, two galactic clusters-- one with about 1, 000 galaxies, the other with 300, totaling trillions of stars-- have gone bump in the night.
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The exhibit outside the Hayden planetarium also features other models designed to convey the scales of the universe, both in time and space, reaching out to galactic clusters and back to the Big Bang.
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The research found that a galaxy's position within the galactic cluster affected stellar evolution within that galaxy : the closer a galaxy is to the center of a cluster, the sooner it stops forming new stars.
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Astrophysicists have long known that there is far too little " visible matter " _ matter that can be detected directly _ to account for the powerful gravitation of galaxies, galactic clusters and other large-scale bodies.
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Einstein's theories helped scientists understand the big bang that created the universe some 15 billion years ago; the expansion of the universe; and the discovery of mind-boggling structures such as neutron stars, black holes and galactic clusters.
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For a brief time, these objects are so bright that they can be observed at great distances, far from the Milky Way's own neighborhood, where gravitational forces of nearby galactic clusters may affect estimates of the expansion rate.
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But then cosmologists began to worry that the radiation was too smooth, indicating a featureless, homogeneous early universe that inexplicably gave way to the irregular cosmos, studded with stars and galaxies and great galactic clusters, that is seen today.
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Melott said the winds across a supercluster are in the right direction and at the right speed to feed matter, including stars, galaxies and gas swept up and transported by the winds, into growing galactic clusters, as many astronomers had theorized.
