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Bliss, originally titled Bucolic Green Hills, is the default wallpaper of Microsoft's Windows XP operating system. It is a photograph of a green rolling hills and daytime sky with cirrus clouds . Charles O'Rear , a former National Geographic photographer, took the photo in January 1998 near the Napa – Sonoma county line, California, after a ...
When accessing space photographs, be sure that you know the source. Pictures not produced by NASA employees may have different usage restrictions . To place a file in this category , add the tag {{ PD-USGov-NASA }} to the bottom of the file's description page.
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This file is a work of a United States Space Force member or employee, taken or made as part of that person's official duties. As a work of the U.S. federal government , the file is in the public domain in the United States.
Raw CMBR data, even from space vehicles such as WMAP or Planck, contain foreground effects that completely obscure the fine-scale structure of the cosmic microwave background. The fine-scale structure is superimposed on the raw CMBR data but is too small to be seen at the scale of the raw data.