Antimatter

In particle physics, antimatter is material composed of antiparticles, which have the same mass as particles of ordinary matter but have opposite charge and quantum spin. Antiparticles bind with each other to form antimatter in the same way that normal particles bind to form normal matter. For example, a positron (the antiparticle of the electron, with symbol e+) and an antiproton (symbol p) can form an antihydrogen atom. Furthermore, mixing matter and antimatter can lead to the annihilation of both, in the same way that mixing antiparticles and particles does, thus giving rise to high-energy photons (gamma rays) or other particle–antiparticle pairs. The end result of antimatter meeting matter is a release of energy proportional to the mass as the mass-energy equivalence equation, E=mc2 shows.

There is considerable speculation as to why the observable universe is apparently composed almost entirely of matter (as opposed to a mixture of matter and antimatter), whether there exist other places that are almost entirely composed of antimatter instead, and what sorts of technology might be possible if antimatter could be harnessed. At this time, the apparent asymmetry of matter and antimatter in the visible universe is one of the greatest unsolved problems in physics. The process by which this asymmetry between particles and antiparticles developed is called baryogenesis.

There are some 500 terrestrial gamma-ray flashes daily. The red dots show those the Fermi Gamma-ray Space Telescope spotted through 2010.
Learn how scientists used the Fermi Gamma-ray Space Telescope's gamma-ray detector to uncover bursts of antimatter from thunderstorms.

Read more about Antimatter:  History of The Concept, Notation, Origin and Asymmetry, Natural Production, Artificial Production

Other articles related to "antimatter":

Antimatter (disambiguation)
... Antimatter is composed of antiparticles in the same way normal matter is composed of particles ... Antimatter may also refer to Antimatter (band), the Ambient/Trip hop/Gothic rock band Antimatter (album), a Cubanate album "Antimatter", a section ...
Low Energy Antiproton Ring
... The Low Energy Anti-Proton Ring (LEAR) was an experiment at CERN designed to decelerate and store antimatter, to study the properties of antimatter and to create atoms of antihydrogen ... The experiment was constructed in 1982 and operated until 1996, when it was converted into the Low Energy Ion Ring, which will be used in the lead ion injection process for the Large Hadron Collider ...
Seetee - Uses - Weapons
... Antimatter has been considered as a trigger mechanism for nuclear weapons ... A major obstacle is the difficulty of producing antimatter in large enough quantities, and there is no evidence that it will ever be feasible ... Air Force funded studies of the physics of antimatter in the Cold War, and began considering its possible use in weapons, not just as a trigger, but as the explosive itself ...
Mick Moss - Discography
2002 - Antimatter – Saviour 2003 - Antimatter - Lights Out 2003 - Antimatter - Live@K13 2004 - V/A - The Lotus Eaters, A Tribute To Dead Can Dance 2004 - Antimatter - Unreleased 98-03 (Internet Release only) 2005 ...
Antimatter - Uses - Fuel
... The scarcity of antimatter means that it is not readily available for use as fuel ... Any antimatter propulsion would require engine construction so as to prevent the annihilation of all the fuel simultaneously ... could be used as a fuel for interplanetary travel or interstellar travel as part of a antimatter catalyzed nuclear pulse propulsion or other antimatter rocketry, such as the redshift rocket ...