Have you heard of this invisible cosmic substance as Dark Matter? They say it takes a large part of the universe — far more than the usual substance that is given to us in sensation.
You've heard of dark matter? They say it takes a large part of the universe — far more than the usual substance that is given to us in sensation.
British researchers at the Jodrell Bank radio astronomy observatory believe that our universe is composed of two-thirds of the dark matter (Dark Matter). Other estimates ordinary matter does not exceed 10% of the actual information contained in the universe of matter. We can say that 90% of matter in the universe is a mystery. This is the matter which can not be observed with a telescope, which does not reflect the rays of light and does not emit photons in any region of the electromagnetic spectrum. In fact, it turns out that there is another type of mass, an invisible substance from which the universe is built.
One of the significant evidence of dark matter in the universe can be considered as the data obtained in the zero years of the 21st century on the space telescope "Hubble" using gravitational lensing. Mingkuk James Gee (Myungkook James Jee), H.Ford (Holland Ford) and other researchers from the Johns Hopkins University, watching the collision of galaxies are from us at a distance of five billion light-years, found that they are surrounded by a ring of dark matter with a diameter 2.6 million light years. The position of dark matter in this area were able to calculate, registering weak distortions of radiation from more distant galaxies that are (according to the line of sight from Earth) for colliding stellar systems.
It is now known that the smallest continuously existing dark matter clumps occupy the space of a thousand light-years, and the mass of these fragments in the tens of times the mass of the Sun.
First is about the invisible matter said in 1930 the Swiss astronomer Fritz Zwicky (Fritz Zwicky). He noticed that a cluster of galaxies in the constellation Coma Berenices, is held together by a strong gravitational field than the one that should be based on the mass of the visible matter in the field. A closer look revealed that the luminous matter in these clusters of galaxies was several times lower than that needed for their joint finding by the force of gravity. Since the law of gravity has not been canceled, it is still in those early years have suggested that there is an invisible substance.
Modern research conducted by orbiter WMAP (Wilkinson Microwave Anisotropy Probe), show that the ordinary matter in the universe is about 5%, 25% is dark matter, and the remaining 70% — the so-called dark energy (Dark Energy). This conclusion was made by experts at Princeton University, analyzed the data from the probe WMAP, which was launched by the American space agency NASA in 2001.
However, there is recent hypothesis, indicating that the dark matter can not be.
Honorary Professor, University of Toronto John Moffat (John Moffat) and Joel Brownstein (Joel Brownstein) of the Canadian Institute for Theoretical Physics, developed a theory of modified gravity, which fully explains the observed behavior of clusters of galaxies. Two Canadian physicist completely do without dark matter. They introduced their theoretical development of the so-called gravitons that arise from a vacuum, and most intensively gravitons are born close to large masses. From which it follows that the center of the galaxy (where large masses) two objects attract each other more strongly than if they were on its outskirts.
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