The age of the universe goes back to the Big Bang. The Bang resulted in a release of energy in the form of radiation. Due to the expansion of the Universe since that time the original radiation has been red-shifted to the microwave range. The background microwave radiation is the best tool for studying the age of the universe.
Mainly, to figure out accurately how far certain galaxies are, and how fast they move away from us.
that portion of the universe that we can see in principle, given the finite age of the universe
9075.6
Electricity is energy, which is as old as the universe itself.
in the neighborhood of 14.5 billion years, from current evidence
500 billion years ago, planet Earth didn't exist. The Universe didn't even exist for such a long time; the age of the Universe is estimated at about 14 billion years.500 billion years ago, planet Earth didn't exist. The Universe didn't even exist for such a long time; the age of the Universe is estimated at about 14 billion years.500 billion years ago, planet Earth didn't exist. The Universe didn't even exist for such a long time; the age of the Universe is estimated at about 14 billion years.500 billion years ago, planet Earth didn't exist. The Universe didn't even exist for such a long time; the age of the Universe is estimated at about 14 billion years.
About 13-14 billion years ago. Cosmologists are not in agreement as to what happened the first few million or billion years, but most agree that the age of our Universe is about 15 billion years.
They don't (a whole lot) study stars for that purpose, as a typical star's life is much less than the life of the universe. They study galaxies. The oldest appearing galaxies also tend to be those farthest away, as measured by red shift. Farthest away of all are the quasars, which are still not fully understood.
The Universe has an age estimated to be about 13.8 billion years.
that portion of the universe that we can see in principle, given the finite age of the universe
9075.6
The universe simply cant expand at 0 acceleration.
Because that is how old the universe is believed to be
If you look at a distant galaxy, the light from the galaxy has travelled for perhaps a hundred million years, a billion years, or up to an age close to the age of the Universe (13 billion years or so), depending on the galaxy's distance. Thus, the light you see shows you how the Universe was billions of years ago.
The universe is 13.7 billion years old & Earth is 4.5 billion years old.
The universe is roughly 14 billion years old.
Electricity is energy, which is as old as the universe itself.
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