By noting how rapidly galaxies are flying apart from each other, and how far apart they are now, we can calculate how far back in time it was that they started to fly apart. No different than the question, "Since the time Pat and Sam both began their journey at the same point on the highway, they have traveled at a speed of 100 kilometers per hour. They are now 200 kilometers apart. How long have they been traveling apart from each other?"
The present calculations of the age of the Universe by this method -- about 13.7 billion years -- agree quite well with other calculations, that were derived in a totally independent manner.
The "big bang". It was considered a derogatory term when it was coined.
The big bang.
What is known as the Big Bang Theory is the currently recognized model of how the universe began.
The "Cyclic Model," AKA the "Oscillating Universe Model."
the big bang theory is a cosmological model wich states that how was universe created and why it is expanding.
The "big bang". It was considered a derogatory term when it was coined.
The Big Bang Theory.
The big bang.
What is known as the Big Bang Theory is the currently recognized model of how the universe began.
In the current model of the universe the big bang was the 1st thing to happen in the universe since time itself was created in the big bang.
the big bang theory is a cosmological model wich states that how was universe created and why it is expanding.
The "Cyclic Model," AKA the "Oscillating Universe Model."
the big bang theory is a cosmological model wich states that how was universe created and why it is expanding.
the big bang theory is a cosmological model wich states that how was universe created and why it is expanding.
Quasar formation is associated with the big bang. The big bang is the model of how the universe was formed.
The steady state model assumes that new matter is created at the universe expands, the big bang theory states that no new matter is ever created, but only changes form.
Bubble theory. Big Bang theory.