Sorry I have added the source of the image now. And This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted"
Sorry I have added the source of the image now. And This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted"
RE: Which line is longer? - Illusions are interesting