Eric Walker added Giant Magellan Telescope - Wikipedia to Giant Magellan Telescope (GMT)
Eric Walker added Giant Magellan Telescope - Wikipedia and American Astronomy’s Future Goes on Trial in Washington - The New York Times to Giant Magellan Telescope (GMT), and added Giant Magellan Telescope (GMT) to Chile and Telescopes
Eric Walker added a number of topics to Telescopes, and added Telescopes to Telescopes, observatories and telescope networks
Eric Walker added a number of topics and a number of links to Chile, and added Chile to Countries in South America