"Another theory goes that the low-frequency gravitational waves were generated just after the Big Bang, right when the “inflation” or early exponential expansion of the universe began. If that bears out, these signals could be analysed to bring scientists to the start of the known universe.
Analysing electromagnetic radiation only gets astronomers to about 400,000 years after the Big Bang. The gravitational waves, if they are indeed relics of the early universe, could contain information that brings us within a nanosecond.
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