they got it so that when light passes thought it it goes faster than light
This makes no sense, light passes through it and propels it faster than light? No. Until I see hard proof, nothing can go faster than the speed of light--not a damn thing. Numerous tests have shown this to be true. How it affects time is particularly interesting, if you wish I'll embelish, but otherwise just look it up, veyr neat.
And aerogel? All I can find is that it's being used to catch particles of a comet's tail.