Galaxy's brightness decreased to one-twentieth of its original level.
Research led by the Chiba Institute of Technology.
Findings may alter understanding of supermassive black hole evolution.
Strategic angle: An international team discovers a galaxy 10 billion light-years away whose brightness dropped dramatically in just 20 years.
Galaxy's brightness decreased to one-twentieth of its original level.
Research led by the Chiba Institute of Technology.
Findings may alter understanding of supermassive black hole evolution.