Eric Walker removed "1999 Chandra X-ray Observatory" from Chandra X-ray Observatory
Eric Walker reordered the synonyms for Chandra X-ray Observatory
Eric Walker added "Chandra X-ray Observatory" to 1999 Chandra X-ray Observatory
Eric Walker added NASA releases stunning new pic of Milky Way's 'downtown' to 1999 Chandra X-ray Observatory
Eric Walker added Missing: One Black Hole With 10 Billion Solar Masses - The New York Times to a number of topics
Eric Walker added Watch This Black Hole Blow Bubbles - The New York Times to a number of topics
Eric Walker added Chandra X-ray Observatory - Wikipedia to 1999 Chandra X-ray Observatory
Eric Walker added Where is the universe hiding its missing mass? to 1999 Chandra X-ray Observatory
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
Eric Walker added a number of links to 1999 Chandra X-ray Observatory, and added 1999 Chandra X-ray Observatory to Space telescopes and research satellites and X-rays