Is the Universe cooling?
At what rate?
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answers:
daniel g say: Burning out might be a better term. Stars, even supernova collapse to near nothing but a small ball of mass.
Supermassive feral black holes may be a whole galaxy collapsed in on itself.
Very very slow process of heat energy changing state. it will still always be there though. Slowly spreading to a larger area is in effect cooling.
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nineteenthly say: Yes.
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Bulldog redux say: The universe has gone from a temperature of 3,000 deg. K at a time 380,000 years after the start of the big bang to a temperature of 2.7 deg. K. now, 13.8 billion years later. That amounts to an average decrease of about 2 2 x 10^-7 deg. (0.00000022 deg.) per year. But most of that cooling took place early in the history of the universe. These days the cooling rate would be much lower.
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Ronald 7 say: The Universe has been cooling since it began with the Big Bang
the Recorded Temperature of the Cosmic Background Radiation is - 270 C
or 3 Kelvin
3 Degrees above what Kelvin discovered was absolute Zero Temperature when in the Labratory, he manged to produce frozen Hydrogen
The least dense of all Elements
All known Elements have been found even in the far reaches of the Universe and they are the Fuel for the Stars
There appears to be no limit as for extreme high Temperatures
Our sun has a Surface Temperature of 6,000 C
Eta Carinae, 7, 500 Light Years is a Blue Hypergiant, 100 times the Mass of our Sun
180 times the Radius and it has a Temperature of 40, 000 K
Photons trying to escape our Sun are subject of Millions of C inside the Core
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#### #### say: If the topology of the universe is open or flat, or if dark energy is a positive cosmological constant (both of which are consistent with current data), the universe will continue expanding forever, and a heat death is expected to occur, with the universe cooling to approach equilibrium at a very low temperature after ...
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Snowwie888 say: The Universe is already bitter cold, only 3 degrees above absolute zero. That 3 degrees is caused by background radiation, which supposedly is an afterglow of the Big Bang.
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quantumclaustrophobe say: It is... as it expands, the heat from the Big Bang disperses. The temperature at the beginning of the universe, when it was so compact and so hot - was too great for even particles to form; about 380,000 years after its birth, the first atoms began to appear. As time goes on, the temperature cools.
https://i.stack.imgur.com/FbcY1.gif
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Richard say: It is not cooling.
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say: Yes. At a very low rate.
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rick29148 say: and WHERE would this 'heat' GO ???
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cameron_c say: The universe is cooling (and expanding) at a rate of 1 billion miles outward in every direction per hour, which will result in a heat death and the ultimate loss of all stars and energy in around 220 trillion years.
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wobafetty say: Light a fire, instantly put that fire out, you will still feel the heat at least for a short period of time afterwards.. Without the source that heat eventually fades/disperses. The big bang was the source, what it left behind is still expanding/dispersing/cooling.
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Jackson say: Question is the universe shrinking
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Tom S say: Yes, the amount of matter/energy is constant, and the volume is growing, the basic laws of thermodynamics define that as cooling. I don't have enough data to calculate the rate.
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CarolOklaNola say: Yes. The cosmic microwave background radiation is now at 2.73 degrees Kelvin above absolute zero. The rate of cooling is not linear in 13.8 billion years is not linear because of phase transitions as explained in https://en.m.wikipedia.org/wiki/Thermody...
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jehen say: Yes, if you count entropy as cooling. But it is also expanding at an accelerated rate. The 'dark energy' that is driving the expansion seems counter to thermodynamic entropy. So to put this another way the amount of space is increasing ever faster. The stuff in the space is 'cooling'. As for the rate, it is not one to worry about, as it will never have an affect on the entire lifetime of our sun and planets of billions of years.
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David say: Every star out there is a huge nuclear fusion reaction radiating massive amounts of heat, how could it be cooling?
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Blaker say: it's simple if you think of it this way-- cup your hands and exhale into them. open your hands and the warm air that was trapped between them will be released and spread out, thus cool down as it spreads throughout your room! imagine your cupped hands as the early universe right after the big bang, and as the universe expands, that "heat" or energy will "spread" to fill the available universe to the best of its ability by creating galaxies and stars! very very very long into the future there might come a point where the universe is so large that the energy or "heat" is almost nonexistent-- stars will begin to die, galaxies will be dim and there won't be enough energy to create more... so the universe will become empty persey! this is called the heat death of the universe.
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olivia say: If the topology of the universe is open or flat, or if dark energy is a positive cosmological constant (both of which are consistent with current data), the universe will continue expanding forever, and a heat death is expected to occur, with the universe cooling to approach equilibrium at a very low temperature
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Ben say: Yes. It is cooling at a slow rate.
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