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In quantum physics, dark matter is invisible. It is quite different from normal luminous matter such as our galaxies, stars, gas, ad planets, because it doesn't give off light or heat. But how do we know it exists if we can't see it? In astrophysics, dark matter can ony be inferred from its gravitational effect on visible matter.

2007-02-22 16:11:06 · 2 answers · asked by watari777ph 1 in Science & Mathematics Physics

2 answers

Obviously not. The name "dark" says it all. These are unknown phenomena expressed only in terms of attributes associated with them that might explain poorly understood observations.

2007-02-22 17:06:50 · answer #1 · answered by Fred 7 · 0 0

they're both placeholder names, for observations shall we make, yet can not completely comprehend or clarify o.k.. darkish count number: products follw very sepcific orbits, given the entire mass of the equipment and the area between the products, as determined by Johannes Kepler and defined in additional suitable element by Isaac Newton. With many galaxies, notwithstanding, we see stars orbiting so quickly, on the outer edges, that, if Kepler and Newton are proper... those products must be flung into intergalactic area, or have a lot slower orbits. One hypothesis is that there is extra count number inthose galaxies than what we may be able to locate, by seen ordinary... or perhaps invisible parts of hte electromagnetic spectrum. So truly, both Kepler, Newton, or perhaps A;ber Eintein's Theroy of wide-spread Relativity are all... incorrect... nicely, no longer a lot incorrect, yet "incomplete" or there is "lacking count number" accessible interior the universe, giving those galaxies extra mass, and hence better gravity to carry those stars to their galaxies. the element about darkish count number is, is does no longer artwork jointly with favourite count number in any respect, except for its gravitational effect. darkish power: The universe is increasing. We don;t comprehend why. there are truly some observations to substantiate that the universe is increasing, yet we do not comprehend the reason. darkish power is the call given to this unknown rigidity. 2: If absolutely everyone is searching for darkish count number contained in the Earth, it really is a lost reason. darkish count number looks insignificant at community scales, and in effortless words applies on the galactic factor... if it even does exist. there is the distant probability that our expertise of gravity is incomplete, and a extra appropriate sort of gravity, and physics as an entire, are not to any extent further understood. Newton's version of gravity works tremendous at non-relativistic speeds, notwithstanding it really is incorrect, as shown by Albert Einstein. one can argue that Eintein's idea of wide-spread Relativiy is extra finished, yet does no longer address all the houses of gravity..

2016-12-04 20:05:26 · answer #2 · answered by ? 4 · 0 0

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