In 2010, astronomers working with the Fermi Gamma-Ray Space Telescope unveiled a previously unseen structure centered in the Milky Way that spans 50,000 light-years that may be the remnant of an eruption from the supermassive black hole at the center of our galaxy. The structure spans more than half of the visible sky, a region roughly as large as the Milky Way itself, and it may be millions of years old, its origin an unsolved mystery.
“A positive result in a search for the pattern would be one of the great experiments in the history of science.” Unidentified point-like very high energy gamma ray sources in the Milky Way may actually be starships of hyper-advanced alien civilizations who are actively exploring interstellar space, proposes Louis Crane in Searching for Extraterrestrial Civilizations Using Gamma Ray Telescopes.
One of the James Webb Space Telescope (JWST) primary objectives will be “to unravel what happened in the first billion years after the big bang,” said Kári Helgason, an astrophysicist at the University of Iceland. “Our work places important new limits on the amount of starlight we can expect to see in those first billion years — a largely unexplored epoch in the universe.”