Tags Dr. Wallace Tucker Chandra's Cosmos, dark energy dark matter large-scale structures of the universe Black Holes galaxy clusters supernova explosions space x-rays XMM-Newton ESA Japan Green Black Holes Exoplanets Hubble Space Telescope James Webb Space Telescope medical x-rays Green black holes Schwarzschild radius x-rays and the search for life exploiting stars x-ray telescope dust & contamination bullet cluster new physics Cern time travel microwave background radiation Sirius planetary exploration tight budgets NASA Guest Dr. Wallace Tucker Tagline "Chandra's Cosmos" by Dr. Wallace H. Tucker View the discussion thread.