Extra Dimensions Clue at Center of the Galaxy...

...physicist Amitai Bin-Nun of the University of Pennsylvania argues that gravitational lensing around Sagittarius A^*, the supermassive black hole thought to be at the center of the Milky Way, might provide a way to search for extra dimensions. In one version of the extra-dimensions scenario, gravity is much stronger near the black hole than it would be without the extra dimensions, so that images of the stars appear larger and brighter than they otherwise would. Bin-Nun used numerical simulations to show that, in a world with extra dimensions compared with one without, a star known as S2 could be as much as 44% brighter when it reaches its peak brightness in 2018. If S2 were that bright, it could be evidence for extra dimensions or at least evidence that our understanding of gravity should be modified.

Link: Black Hole May Offer Clues to Extra Dimensions