This handout picture shows scientists launching a balloon from Williams Field in Antarctica in December 2005 that is carrying a scientific instrument that detected possible evidence of so-called dark matter in space. It spotted an unexpected amount of very high energy cosmic ray electrons coming from an unknown source within about 3,000 light years of the solar system -- relatively close in astronomical terms. One explanation is that the electrons may have been spawned as dark matter particles collided with one another, triggering their mutual annihilation. Scientists think perhaps 25 percent of the universe is made up of dark matter, which is invisible and poorly understood. (T. Gregory Guzik/Handout/Reuters)From Reuters:
WASHINGTON (Reuters) – A balloon-borne instrument soaring high over Antarctica has found evidence of a possible large clump of mysterious so-called dark matter relatively close to our solar system, scientists said on Wednesday.
It detected an unexpected amount of very high energy cosmic ray electrons coming from an unknown source within about 3,000 light years of the solar system. A light-year is 6 trillion miles (10 trillion km), the distance light travels in a year.
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