เมื่อวานฉันเมาจำไม่ได้

เมื่อวานฉันเมาจำไม่ได้

ผลลัพธ์ (อังกฤษ) 1:

Yesterday I have not drunk.

ผลลัพธ์ (อังกฤษ) 2:

When I'm drunk I do not remember.

ผลลัพธ์ (อังกฤษ) 3:

A black hole sun could be friendlier than you might expect. Planets orbiting a black hole - as they do in the filmInterstellar. To could sustain life thanks to, a bizarre reversal of the thermodynamics experienced by our sun and Earth.According to the second law of thermodynamics life requires, a temperature difference to provide a source of useable, energy. Life on Earth exploits the difference between the sun and the cold vacuum of space but what, if you flip the temperatures. Around with a, cold sun and a hot sky?That 's exactly what a planet orbiting a black hole would see says Tom, and š Opatrn ý of Palack ý University, in Olomouc Czech. Republic - though it wouldn 't look much like the one imagined by the grunge band Soundgarden.Bright but cold.Despite, the name most black holes are among the brightest objects in the universe because gas, and other matter falling. In is superheated and glows as it accretes. But a satiated black hole effectively has zero temperature barring a, trickle. Of particles released by a process called Hawking radiation meaning it, could potentially act as a, cold sun says Opatrn ý.? "We need a fairly old black hole that has already cleared its surroundings and which is not further fed."Compared to this chilly character the rest, of the universe is a relatively balmy 2.7 Kelvin (about - 270 ˚ C), thanks to. The cosmic microwave background (CMB), the heat left over from the explosion of the big bang. The team calculated that an. Earth-sized planet orbiting a black hole that appeared a similar size to our sun in the sky could extract around 900 watts. Of useful power from this temperature difference - enough for life to, potentially exist but hardly enough to run a civilisation.Complex life.But the CMB was hotter earlier on in the universe - Avi Loeb of Harvard University has previously pointed out the universe s. ' Background temperature would be 300 Kelvin (27 ˚ C) around 15 million years after the, big bang making it warm enough to. Host liquid water. At this temperature a planet, around a sufficiently cool black hole would receive 130 gigawatts, of power. Around a millionth of what the sun provides Earth. That 's enough to support, complex life though so short into the universe s.' Existence it ', s unlikely that it would have had time to evolve enough to explore this power source.Ads by ZINC.Wondering if any more power might, be available the team turned to the, film Interstellar in which a world called Miller s. ' Planet orbits very close to, a massive spinning black hole called Gargantua. General relativity means the black hole s gravitational. ' Pull slows time on the planet so that 1 hour is equal to seven, years off-world a factor of, around 60 000."We saw the movie it was, a very, interesting idea but then we started thinking about the problems," says Opatrn ý.Aluminium tsunamis.The energy of light is proportional to its frequency. This means that when light from the CMB hits Miller ', s planet and. Its frequency is increased by this, time dilation its energy increases. With a time-dilation factor of around 60 000 Miller 's,,, Planet would be heated to nearly 900 ˚ C.In the film the planet, is swept by huge tidal waves of water but Opatrn, ý says his calculations mean molten aluminium. Would be more likely. Conditions would be cooler if the planet were slightly further out from the, black hole lessening. The effects of time dilation and making it more hospitable to life. "It 's interesting that [the analysis] suggests the microwave. Background would be disastrous for observers on, the planet making the movie once again less realistic, "says Lawrence Krauss. Of Arizona State University.Loeb thinks that the theoretical idea of a cold sun and a hot sky to support life is interesting but in, practice it is. Unlikely to occur in the universe. "There is always matter falling at some level into a black hole," he says meaning the,, Black hole sun wouldn 't stay cold enough for long.Our future home.Life will eventually have to emigrate to planets around black holes once all the stars, die out but that won 't be for around 100 trillion. Years. Even then it ', s more likely that any future beings will absorb light from accreting matter rather than dwell under. A cold sun as by, then the CMB will have faded into nothing. "When the stars are gone black holes, will be a last-resort. Source of energy, "says Krauss." For the practical future there are, much easier ways to live. "Reference: arxiv.org / ABS / 1601.02897.