The Quran says that angels use these wormholes to reach any place in the universe. An observer outside gravitational fields sees those angels passing by him at 99.99999...% of the speed of light (relativistic speeds, very close to the local speed of light), that is at 299792.457999...km/s. But when those angels enter the gravitational field of a wormhole this observer still sees those angels entering the wormhole at 99.99999...% of the speed of light however that would no longer be at 299792.457999...km/s. This is because in the presence of gravity the speed of light becomes relative. If he sees the speed of light in a wormhole at 10 meters/sec, for example, then he would see those angels traveling at only 9.999999...meters/sec, flapping their wings in slow motion, reddish in color and very dim (and in turn they would see him in fast motion, bluish in color and very bright). A smaller time dilation (say 100 or 1000 years vs. one day) can also occur if we stand on Earth and angels stand on a neutron star (or resist their fall into a neutron star; gravitational time dilation). This makes their velocity relative to us to be zero (and not 299792.457999... km/s). But naturally occurring wormholes connect distant black holes; however at a lower time dilation (100 or 1000 years vs. one day) the two entrances of the wormhole cannot connect; hence a wormhole cannot form. So with the time dilation stated in the Quran (50,000 years vs. 1 day) and the fact that angels are moving then those angels have to be crossing a wormhole. The neutron star or any other scenario cannot do. Learn more: Wormholes.