By Sean McWilliams, Assistant Professor of Physics and Astronomy, West Virginia University. Artist’s conception of two merging black holes, spinning in a nonaligned fashion. LIGO/Caltech/MIT/Sonoma State (Aurore Simonnet), CC BY-ND For the third time in a year and a half, the Advanced Laser Interferometer Gravitational Wave Observatory has detected gravitational waves. Hypothesized by Einstein a century…