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The Artemis Galaxy was Artemis Zogg's artificial galaxy created from planets stolen from the other galaxies of the universe. Galaxies from which planets were taken included the Polaris Galaxy, Solana Galaxy and Bogon Galaxy. The moving of worlds from one galaxy to the Artemis Galaxy was Zogg's procedure known as the Helios Project.
Note that all of these planets were returned to their original galaxies after Zogg was sucked into Dimension A2-66.