Scientists Say They’ve Discovered Echoes Of The Big Bang

Scientists have discovered gravitational waves that reaffirm the theory of cosmic inflation, which suggests that the universe rapidly expanded within the first fraction of a second of the Big Bang, almost 14 billion years ago.

“Detecting this signal is one of the most important goals in cosmology today,” said John Kovac at the Harvard-Smithsonian Center for Astrophysics in a statement. Kovac led the team that detected this pattern.

The theory of inflation was first proposed in 1979 by MIT physicist Alan Guth, who describes this hyper-expansion as the “bang” of the Big Bang. Observations through a Background Imaging of Cosmic Extragalactic Polarization 2 telescope based at the South Pole detected a faint glow left from the Big Bang as well as tiny fluctuations. The detection of B-modes, or a twisting in the polarized orientation of ancient light, serves as the first direct evidence for inflation, as they can only be created by ripples caused by inflation.

“The swirly B-mode pattern is a unique signature of gravitational waves because of their handedness. This is the first direct image of gravitational waves across the primordial sky,” said Stanford’s Chao-Lin Kuo, who designed the telescope detector.AT