16.03
sami's
the immensity of the visible universe is simply mind-boggling. However, at this point, we really have no idea what proportion of the whole universe we observe is. Recent theories on the origin of the universe indicates that the vastness of the universe might be "infinitesimal" grains in the Multiverse (ie the set of existing universes ).
is the work of Edwin Hubble was the first to give astronomers the idea of the immensity of the universe. Work on Mount Wilson in 1930 with what were then the largest telescopes in the world, Edwin Hubble's sample pictures in many regions of the sky (about 1283 regions), and counts the number of galaxy images could reveal his photographic plates. The survey represented a ticket to our galaxy, the Milky Way, through the middle of the land in what came to be called the galactic equator (upper and lower part of the map are called poles ).
After being corrected for the dimming effect of obscuring dust clouds when observing the sky in the direction of the Milky Way, Hubble concluded that the vast distribution of galaxies is isotropic, ie galaxies are evenly distributed around nasnebo. Hubble's observation led to the view that our universe is homogeneous, ie, the same in all directions and at all distances. The idea of isotropy and homogeneity of the universe is called the cosmological principle remains princip.Kozmološki underlying assumptions in cosmology.
astronomer observing the distribution of galaxies in large parts of pieces of space have shown that our galaxy is a member of a small group of galaxies called the Local Group skupina.Lokalna about three million light years and contains at least 26 members (three large spiral galaxies, 9 dwarf irregulars, 2 medium ellipticals and 12 dwarf elliptical ).
Other galaxy clusters have been discovered outside our own. The nearest visible from our planet is the Virgin cluster, the system consists of thousands of galaxies. Another cluster of galaxies is larger than the Virgo Coma cluster. We can detect these particular groups because they are densely packed galaxies whose brilliance stand out against the background of other galaxies and clusters.
It is believed that there are several smaller galaxy clusters closer to us than the Virgin and coma that can not be seen on the background light from other galaxies in the universe. Astronomers continue to discover that there are even clusters of galaxies klastera.Otkriće of great interest to astronomers is the fact that between these super clusters of galaxies are huge stretches of emptiness.
study of our local super cluster of galaxies, of which the Virgin is the most prominent, reveals the local super cluster mostly empty space. Most of the galaxies belonging to local classes, which together occupy only about 5% of the total volume of space in the local super cluster 60 million light-years.
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