How old is the cosmos?

Answer 1

"Cosmic rays" are highly-accelerated particles, mostly protons, that permeate outer space.

Current theory about the oldest cosmic rays indicates they may originate from the decay of somewhat exotic sources created by the 'Big Bang' about 14 billion years ago. However, the high speed of these particles suggests that many derive from acceleration by galactic centers, which formed beginning about a billion years later, or from supernovas that occurred relatively recently in astronomical time.

Answer 2

The latest theories place the age of the cosmos as 13.7 billion years

Answer 3

Right now the cosmos are expanding faster and faster as time goes, so we cannot measure the cosmos yet.

Answer 4

The cosmos is estimated to be approximately 13.8 billion years old based on scientific evidence such as the cosmic microwave background radiation and the expansion of the universe.