Early Universe seems to run at 20% speed

Researchers have spotted the earliest instance of cosmological time dilation, which makes time seem to run at one-fifth of today’s speed in the early Universe — a phenomenon explained by the general theory of relativity. Observing a quasar hailing from a time when the Universe was just one-tenth of its current age is “like watching a movie with the speed turned down”, says astrophysicist and study leader Geraint Lewis. Quasars are supermassive black holes surrounded by an extremely bright disc of hot gas and are among the oldest objects in the Universe. Previous observation of time dilation made using distant supernovae went back to only around half the age of the Universe, when time seemed to run at 60% of today’s speed.

Blogger Comments:

Time does not "run". Time is a dimension. Time dilation means that the time intervals between the ticks of a clock are longer, which means it takes longer for a clock to tick, which means that processes take longer to unfold. As space intervals expand, time intervals contract, so time intervals in the past were expanded relative to the present.