00:04We know the universe is and has always been expanding but we've never really
00:08known just how fast it's happening that is maybe until now according to a pair
00:12of new studies experts say they were able to use novel techniques to watch a
00:16star die not once not twice but five times researchers use what's called
00:20gravitational lensing or when you use the gravitational well surrounding massive
00:24objects in the cosmos like a galaxy cluster and use the curvature of space
00:28time where light bends around it as a lens to look further into time and space
00:32this can result in light from the far reaches of the universe reaching our
00:35telescopes via multiple routes meaning we can effectively watch an event in this
00:39case a supernova happening multiple times so by looking at the
00:43gravitationally lensed image from multiple routes experts were able to calculate the
00:47travel time of the light to earth using that data to then calculate just how
00:50much the universe expanded in the amount of time it took the light to get to our
00:54instruments so how fast is it expanding well you might need a degree in astrophysics
00:58to even understand the answer to that according to the new data it's
01:02expanding at a rate of around 46 miles per second per mega parsec which is a
01:06distance of around 3.26 million light years
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