Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Antimatter in space?

  1. Jan 19, 2005 #1
    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
     
    Last edited: Jan 19, 2005
  2. jcsd
  3. Jan 20, 2005 #2

    Nereid

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    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).
     
    Last edited by a moderator: May 1, 2017
  4. Jan 20, 2005 #3
    Thank you for the information! :smile:
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Antimatter in space?
  1. Antimatter in Universe (Replies: 8)

  2. Quasars and Antimatter (Replies: 4)

  3. Antimatter sun (Replies: 17)

  4. Antimatter universe (Replies: 5)

Loading...