Eric Walker added XMM-Newton - Wikipedia to 1999 XMM-Newton
Eric Walker added Astronomers witness the steadfast beating heart of a black hole - CNN and XMM-Newton - Wikipedia to XMM-Newton, and added XMM-Newton to Space telescopes and research satellites, X-rays and European Space Agency (ESA, ASE)
Eric Walker added a number of topics and a number of links to European Space Agency (ESA, ASE), and added European Space Agency (ESA, ASE) to Europe and Space travel, exploration and defense
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 X-rays, and added X-rays to Photons and light