Whether or not these spaces actually exist is a matter of some controversy in the scientific community. In part this is because there isn’t actually much tangible evidence to identify them, and there’s a lot that still remains unknown about how and why they’re formed. Most researchers who’ve spent time studying the cosmos will readily admit that there’s a lot that remains unknown. There is significant backing for the theories of gravitational space voids, but much of it is based on speculation and best guesses from numerical readings and charts.
For now, it seems, Einstein was right. But one of the most exciting things that LIGO could potentially discover is a flaw in the theory, Reitze said. Einstein's theory of gravity has withstood scrutiny for more than a century, but it also doesn't match up with the theory of quantum mechanics. The lack of an obvious connection between gravity (which generally describes the universe on very large scales) and quantum mechanics (which describes the universe on very small scales) is one of the most significant unsolved problems in physics. That problem isn't likely to go away unless it turns out there's some still-undiscovered angle to one or both of those theories.