Background radiation, if it gets lower than it already is, what `s the fate for whole of the universe?

Answer 1

Background radiation started to fade the moment the universe was created. The microwave radiation we see now is a remnant of the big bang. The real point of no return is when entropy has increased and all matter has expanded to the point where no future stellar formation is possible - in maybe 100 billion years from now. Whether the universe will reform is down the amount of DARK MATTER in the universe, a point of much debate at present.

Answer 2

The radiation you are refering to are photons given off when the universe became "transparent" to light - at the moment that light "decoupled" from matter (stopped being absorbed by atoms forming) and could pass through. It's like a cloudy liquid being diluted by more water, only here the water is empty space and the cloudiness is caused by electrons absorbing photons. All of a sudden the photons aren't getting absorbed. That's what the background radiation is - the photons left over from that period. So these photons have a certain energy distribution (certain 'colors'), and you can use this distribution to measure the temperature of the universe at that time. You can also use it to get the temperature of the universe now. It's right about 2.73K (K = Kelvin temperature scale). As the universe expands, this gets lower, but nothing happens to the universe. It just cools down. Eventually, the stars will all burn out and we will just be a dark universe...how depressing...The link below is a brief history of the universe.

Answer 3

We already know - in a few billion billion years the universe will have slowed to a near standstill and we will all be extinct
However that is really not the issue. Global warming will (without massive intervention) finish us all off in a few hundred years.

Answer 4

The Big Crunch

Answer 5

As my granddaughter says "cool man real cool"

Answer 6

it will be life jim. but not as we know it