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These files are in the public domain because they were created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (NASA copyright policy page or JPL Image Use Policy). Warnings: NASA logos (which include the current "meatball" logo, the old "worm" logo, and the seal) are copyrighted. Materials from the Hubble Space Telescope may be copyrighted if they do not explicitly come from the STScI. [1] All materials created by the SOHO probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3]