what's the age of the universe?

Answer 1

The age of the Universe (currently accepted to be 13.7 billion years), according to the Big Bang theory, is defined as the largest possible value of proper time integrated along a timelike curve from the Earth at the present epoch back to the "Big Bang". The time that has elapsed on a hypothetical clock which has existed since the Big Bang and is now here on Earth will depend on the motion of the clock. According to the preceding definition, the age of the universe is just the largest possible value of time having elapsed on such a clock.

Answer 2

Until recently, astronomers estimated that the Big Bang occurred between 12 and 14 billion years ago. To put this in perspective, the Solar System is thought to be 4.5 billion years old and humans have existed as a species for a few million years. Astronomers estimate the age of the universe in two ways: 1) by looking for the oldest stars; and 2) by measuring the rate of expansion of the universe and extrapolating back to the Big Bang;

Answer 3

The age of the universe depends on the numerical value of the Hubble constant, which is so far only an estimate. To answer your question: Anywhere from 12 billion years to 14.5 billion years old. The obvious lower limit would be stars we can see whose ages we can calculate with a fair degree of accuracy. You can't have a 12 billion year old star in an 11 billion year old universe. And there are indeed stars estimated to be as old as 12 billion years.

Answer 4

the latest estimate is at 12 to 16 billion years old

Answer 5

Add few billion years in yours or my age, and you get age of the universe.

Very simple!

Answer 6

13.7 billion years as measured by COBE and WMAP CMB (Cosmic Microwave Background) radiation measuring probes.

Answer 7

billions of years

Answer 8

~6000 years

j/k, it's about 13.7 +- 0.35 billion years old