How did scientists determine the Big Bang occurred 13.7 billion years ago?

Question

Ariana Acosta · Accepted Answer

Hubble constant #H_0# is estimated as 71 km/s/megaparsec ( #[H_0]=T^(-1)# ). The reciprocal 1/71, expressed in billion years, is 13.77 that is an estimate of life of our universe, since Big Bang.

Estimates of the speed at which a galaxy recedes from another Doppler Effect: A source's light is wave-shifted when it leaves the source duration by the light source's motion). Edward Powell Hubble ( 1889–1953) had found a linear relationship between the both the distance and the speed. Hubble constant #H_0# is estimated as 71 km/s/megaparsec ( #[H_0]=T^(-1)#= 1/Time ). The reciprocal 1/71 expressed in billion years is 13.77. This is just a conversion issue with units. This could be a lower bound for the amount of time that had Since the Big Bang, more research advancements have occurred. that raise the upper bound on this considerably.

Hailey Alvarez · Answer

undefined The current estimate of the universe's age, 13.7 billion years, is supported by a variety of methods used by scientists to determine the age of the Big Bang. These methods include measurements of the universe's expansion rate, observations of the cosmic microwave background radiation, and analyses of the oldest objects in the universe, such as globular clusters and specific types of stars.