This image is an unannotated version of NASA's Photojournal Home Page graphic released in October 2007. Original from NASA.… Free Image from public domain license 
The terrain for the scientific work conducted by ICESCAPE scientists on July 4, 2010. Original from NASA. Digitally enhanced… Free Image from public domain license 
This image of Ceres is part of a sequence taken by NASA's Dawn spacecraft. Original from NASA. Digitally enhanced by… Free Image from public domain license 
NASA astronauts in space - Sept 5th, 2012. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
On July 20, the U.S. Coast Guard Cutter Healy steamed south in the Arctic Ocean toward the edge of the sea ice. Original from… Free Image from public domain license 
Nearly cloud-free view of Great Britain and Ireland was acquired by the Moderate Resolution Imaging Spectroradiometer aboard… Free Image from public domain license