what is antimatte r ?

 Antimatter is thought to be the exact same as regular matter, only the charges of the particles are the opposite of what one would expect to find. For example, normal electrons have a negative charge, but antimatter electrons have a positive charge

 If the matter and the antimatter come in contact with each other, they go off in a big explosion which results in a huge amount of energy released in space.  Because antimatter can make so much energy, it can be used for a lot of things, such as fuel for going to space, or in our cars. The problem is that antimatter is very very expensive to make, and is almost as expensive to store, since it cannot touch regular matter. It takes several hundred million dollars to make less than one-millionth of a gram of antimatter. In fact, it is the most expensive and rare substance on Earth. Since it is so expensive, this means that antimatter is not practical to use as a weapon or as an energy source, because so little of it is obtainable.fuel

 Antimatter could possibly be the fuel that powers spaceships to the planets and perhaps the stars.  "Mars in 6 weeks? And back in a total of four months That's the prediction of a design team working on antimatter rocket concepts at Pennsylvania State University. But first, you have to get the stuff - and store it. (PSU)"  -Space craft would achieve much greater speeds and be able to stay in space for longer periods of time.

 -Antimatter has tremendous energy  -Matter-antimatter annihilation - the complete conversion of matter into energy - releases the most energy per unit mass of any known reaction in physics.  -The popular belief is that an antimatter particle coming in contact with its matter counterpart yields energy, gamma rays up to 511,000(Five hundred eleven thousand) electron volts.  -This could be used as an auxiliary energy source for the space program, saving millions in fossil fuels, but losing billions in dollars.  -In fact, it would cost one-hundred billion dollars to create one milligram of antimatter.

 -It costs far more energy to create antimatter than the energy one could get back from an antimatter reaction. Right now standard nuclear reactors, which take advantage of the decay of radioactive substances, are far more promising as power generating technology than antimatter. Something to keep in mind, too, is that antimatter reactions - where antimatter and normal matter collide and release energy, require the same safety precautions as needed with nuclear reactions.

 -Antimatter isn't restricted to space; applications for medicinal purposes include a radioisotope generator for Positron Emission Tommography, and radiography for detection and possible treatment of tumors.  -This is done by injecting isotopes into the brain, usually of carbon, nitrogen, oxygen, and flourine.  -These isotopes are most often used, due to their rate of decay, usually a few minutes to a few hours.  -As the radioisotopes migrate from the decay site, each becomes two photon.  -The image then received is that of several thousand photons around a decay site; unlike x-rays, which can only show density, PET scans provide information such as chemical uptake.  -Like all uses of antimatter, this procedure is costly, up to several million dollars.

 -Scientists have devised a method of testing antimatter, coming down to the simples element, Hydrogen.  -Hydrogen was the most logical choice as it has been tested and contains one proton, neutron, and electron.  -For the antihydrogen, there shoyuld be one antiproton, an antineutron, and a positron.  -In theory, the electron should be attracted to the proton with the exact same force that the positron would be attracted to the antiproton.  -If any of this should not happen, physicists will have to re- examine some of our most basic theories about the universe. 

 According the one theory after the big bang, be formed same number matter and antimatter..  But now, Our Universe’s generally have matter, where’s other antimatters ?  Maybe, in blackhole, or darkmatter or dark energy..