The dark matter that all galaxies apparently contain a. Consists of antimatter b. Consists of cosmic rays

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The dark matter that all galaxies apparently contain
a. Consists of antimatter
b. Consists of cosmic rays
c. Consists of dead stars
d. Is of unknown nature

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Related Book For  answer-question

The Physical Universe

ISBN: 978-0077862619

16th edition

Authors: Konrad B Krauskopf, Arthur Beiser

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