Eric Walker added What the SUN looks like over 10 years (NASA time lapse) to Solar system and 2010 Solar Dynamics Observatory (SDO)
Eric Walker added Solar Dynamics Observatory - Wikipedia to 2010 Solar Dynamics Observatory (SDO)
Eric Walker added a number of topics and Maxar and Space telescope - Wikipedia to Space telescopes and research satellites, and added Space telescopes and research satellites to Artificial satellites, satellite networks, space stations and space missions and Telescopes
Eric Walker added a number of topics and a number of links to National Aeronautics and Space Administration (NASA), and added National Aeronautics and Space Administration (NASA) to Space travel, exploration and defense and Branches and agencies of the United States government