If the big bang were valid, 15 billion years would not be the age of the Universe. The oldest stars we see are thought to be a little over 13 billion light years away, given a big bang. Since they moved out to that position at a speed less than the speed of light, they would have to have been well over 30 billion years old at that time. There are thought to be stars beyond them, so 40 billion years is not an unreasonable guesstimate for the age of the Universe.
However, if the cosmological red shift is a gravitational interaction with masses passed in space as I suspect (see the Red Shift essay link below), the Universe is infinite in age.
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Another perspective with equations offered in support:
The Universe is Cyclic with a cycle time of 16.5 billion years. The cycles repeat to give infinite age. The redshift is indicative of the Universe being in Gravitational equilibrium. The Gravitational Energy E=-mu/R + mcv, there is continuity between the centripetal acceleration g=v^2/R and the centrifugal acceleration cv/R cos(v). The redshift is the result of v^2/R=cv/R cos(v) thus v/c=cos(v)= sqrt(GM/Rc^2). Gravitational energy E=-mu/R + mcv is a quaternion energy consisting of a real energy -mu/R and the vector energy mcv. The real energy gives centripetal acceleraion and the vector energy gives the centrifugal (dark energy). Newton and Einstein did not include the vector energy in their gravity, though Einstein tried to add somethig to the same effect in his "Cosmological Constant. The Universe is finite in size R=158E24meters, Mass=2.133E53 kg and infinite in age, cycles of 16.5billion years. The shape of the universe is cuboctahedron..
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It will probably turn out that many aspects of cosmology will forever remain outside of our grasp. There are huge problems to overcome, whether you advocate a universe that has a beginning, or a universe that is indefinitely old. There are 'initial conditions' problems with 'big bang' models, and some thorny gravitation and observed expansion problems with indefinitely old universes. Many theorists believe that a special period of expansion occurred very early on (in the big bang models) where the speed of light was not a limiting factor. This expansion might have lasted only a tiny fraction of a second; this would have been long enough to account for current observations. It is possible that both space and time came into existence together at the time of the initial expansion, whatever that might have been. If that is the case, then one trillion years ago simply does not exist.
The universe is 13.7 billion years old & Earth is 4.5 billion years old.
14 billion
Well, my friend, Earth is like a tiny speck of paint on a grand cosmic canvas. Can you believe that Earth is just about 4.5 billion years old while the universe itself is estimated to be around 13.8 billion years old? That's a lot of happy little accidents happening over a lot of time!
Space has existed for approximately 13.8 billion years, which is the age of the universe according to current scientific estimates. This is based on the Big Bang theory, which suggests that the universe began as extremely hot and dense, expanding and cooling over time to form the vast expanse of space we see today.
The age of the universe according to the Hubble Space Telescope is estimated to be around 13.8 billion years. This estimate is based on observations of the cosmic microwave background radiation and the expansion rate of the universe.
I would say around 8 billion years. Earth has been around for 5 billion years, and the universe has existed for only 13 billion. In other words, A LONG< LONG< time The universe has existed for 14 billion years. God!!
If you counted 1 number per second, it would take 4000 trillion months (320 trillion years) to count all 10 billion trillion stars (100 billion per galaxy) in a fictitious version of our universe.
The universe has existed for more than 14 billion years, the sun for more than 4 billion years - both well over 3 million years.
One trillion years is an extraordinarily long period of time, equating to 1,000 billion years. To put it in perspective, the current age of the universe is estimated to be about 13.8 billion years, meaning one trillion years is roughly 72 times the age of the universe. This duration is far beyond human comprehension and is often used in theoretical discussions about cosmic timescales.
1.5 trillion.
If you counted at the rate of one number per second, it would take 320 trillion years to count to 10 billion trillion. It makes no difference WHAT you're counting.
The Sun is about the same age as the Earth, ca. 4.6 billion years. The universe's age is estimated at 13.7 billion years. That means that the universe had existed about 9.1 billion years before the Sun began shining.
No. The sun exists as inside the universe and was created after the big bang. Nothing (that we know of) existed before the universe.
About 320 trillion years.
15 trillion 211 billion seconds equates to 482,018 years.
According to prevailing theories the universe has not existed for an infinite amount of time but is approximately fourteen billion years old.
They can't. The universe is only about 13 billion years old. If there are galaxies a trillion light years away their light has not reached us yet and due to the expansion of the universe, never will. At the edge of what we call the observable universe we cannot make out individual stars, but we can detect galaxies using infrared telescopes.