NASA to launch probe to map solar system's edge

(AP) -- A small NASA spacecraft embarks on a two-year mission this weekend to give scientists their first view of the happenings at the edge of the solar system.

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<p><a href="http://www.physorg.com/news143472604.html">NASA to launch probe to map solar system's edge</a></p> <p>(AP) -- A small NASA spacecraft embarks on a two-year mission this weekend to give scientists their first view of the happenings at the edge of the solar system.</p>