Antimatter in space?

  • #1
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I've read that in 1977, scientists approximated that there is a deposit of antimatter in the center of our galaxy. How could antimatter exist freely in space while coming into contact with matter? I know that once antimatter and matter come into contact, they are destroyed immediately while releasing a large amount of energy. Does anyone have an explanation for this?

Source: http://science.howstuffworks.com/antimatter1.htm
 
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Answers and Replies

  • #2
Nereid
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http://astro.estec.esa.nl/Integral/POMJan2004.html [Broken]

As to how positrons (the only anti-matter observed to date, other than anti-protons etc in cosmic rays) can exist without being annihilated ... if the space density of matter is low (say, < 10^3 electrons/cm^3), positrons can 'sit around' for a long time before they meet their nemises (electrons).
 
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  • #3
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Thank you for the information! :smile:
 

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