Black Holes
In 2015 two powerful telescopes detected something physicists had been seeking for more than one hundred years—gravitational waves from the collision of two black holes. This announcement thrilled the scientific community. Since the eighteenth century, astronomers have predicted the existence of massive, invisible stars whose gravity would not let anything—even light—escape. In the twenty-first ce...
In 2015 two powerful telescopes detected something physicists had been seeking for more than one hundred years—gravitational waves from the collision of two black holes. This announcement thrilled the scientific community. Since the eighteenth century, astronomers have predicted the existence of massive, invisible stars whose gravity would not let anything—even light—escape. In the twenty-first ce...
