Dark Matter and Dark Energy Of The Universe

What is dark matter and dark energy ?

In astronomy and cosmology, dark matter is hypothetical matter that does not interact with the electromagnetic force, but whose presence can be inferred from gravitational effects on visible matter. According to present observations of structures larger than galaxies, as well as Big Bang cosmology, dark matter and dark energy account for the vast majority of the mass in the observable universe. The observed phenomena which imply the presence of dark matter include the rotational speeds of galaxies, orbital velocities of galaxies in clusters, gravitational lensing of background objects by galaxy clusters such as the Bullet cluster, and the temperature distribution of hot gas in galaxies and clusters of galaxies. Dark matter also plays a central role in structure formation and galaxy evolution, and has measurable effects on the anisotropy of the cosmic microwave background. All these lines of evidence suggest that galaxies, clusters of galaxies, and the universe as a whole contain far more matter than that which interacts with electromagnetic radiation: the remainder is called the "dark matter component."[…]

The Recent Developments on Dark Matter and Dark Energy Of The Universe:

• New Detector Will Aid Dark Matter Search: Several research projects are underway to try to detect particles that may make up the mysterious "dark matter" believed to dominate the universe's mass. But the existing detectors have a problem: They also pick up particles of ordinary matter that masquerade as the dark-matter particles. An MIT physicist has a solution.[1]
• Dark Fluid: Dark Matter And Dark Energy May Be Two Faces Of Same Coin: Astronomers believe they can "simplify the dark side of the universe" by shedding new light on two of its mysterious constituents. Only 4% of the universe is made of known material - the other 96% is traditionally labeled into two sectors, dark matter and dark energy. "Both dark matter and dark energy could be two faces of the same coin," according to an astrophysicist.[2]
• How Fast Does Dark Matter Fall?: Dark matter is mysterious stuff. Scientists don't really know much about it at all, other than the fact that there seems to be a lot of it in the universe. Thanks to a new analysis by physicists at Caltech and the University of Toronto, we can expect that lumps of dark matter gravitationally attract each other in just the same way that lumps of normal matter (like you and the earth, for instance) attract each other.[3]
• Dark Matter Disk In Our Galaxy, Supercomputer Simulation Shows: The Milky Way contains a disk of "dark matter," according to new calculations by astronomers. They have used the results of a supercomputer simulation to deduce the presence of this disk.[4]
• Galaxies Are Born Of Violence Between Dark Matter and Interstellar Gas: Researchers using supercomputer simulations have exposed a very violent and critical relationship between interstellar gas and dark matter when galaxies are born -- one that has been largely ignored by the current model of how the universe evolved. The findings, published in Science, solve a longstanding problem of the widely accepted model -- Cold Dark Matter cosmology -- which suggests there is much more dark matter in the central regions of galaxies than actual scientific observations suggest.[5]
• Dark Matter Of The Universe Has A Long Lifetime: The universe consists not just of visible celestial bodies, stars, planets and galaxies. It also has a mystical fellow player -- dark matter. The astronomers can measure that the dark matter exists in big quantities but no one knows what it is, nobody has seen it. It does not emit light and it does not reflect light. It is invisible. New research is starting to illuminate the mysterious nature of dark matter.[6]