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Regjistruar: 28/01/2003
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Universi
Chicago Tribune ka aktualisht disa artikujt mbi Universin. Artikujt flasin per fotografine e fundit te NASA-s, nje fotografi qe supozohet te jete e Universit kur ishte 380,000 vjeç. Aktualisht universi eshte 13.8 miliard vjeç. Sipas NASA-s, fotografite e fundit tregojne ekzistencen e nje "energjie te erret" e cila i kundervihet forces se gravitetit. "Zbulimi" i kesaj "energjie te erret" kundershton, sipas NASA-s, teorine e vjeter qe nje dite Universi thjesht do te filloje te zvoglohet duke shkaterruar cdo gje ne proces. Teoria e re per te ardhmen e Universit eshte qe do te vazhdoje te rritet deri sa energjia te zvogelohet dhe te jete e pamjaftueshme per te mbeshtetur jeten ne Toke ose ne planete te tjera.
Te me falni per perkthimin e çalë. Per ata qe deshirojne te lexoje artikullin ne anglisht po e postoj me poshte:
The end of the universe, (continued)
February 21, 2003
Got the baby pictures back the other day, and NASA sure is proud. Its satellite snapped the earliest pictures ever of the universe, at a precocious 380,000 years old (it's now about 13.7 billion, give or take 1 percent, the scientists say.)
For those who spend their time contemplating the beginning and end of the universe, the pictures stirred a lot of excitement. Not only do they give us the best glimpse yet of the Big Bang, but they also may foretell how the universe will end.
Those pictures demonstrate what NASA says is clearer evidence of the existence of a mysterious cosmic substance called "dark energy," which counteracts gravity. Even though no one can yet explain exactly what dark energy is, NASA's new data put a sizeable crimp in the Big Crunch theory that the universe would one day collapse, extinguishing all life in the process.
Maybe universal destruction wasn't keeping you up at night. But this is huge news to astronomers, who have debated for decades about the Big Bang and the Big Crunch. This doesn't end the debate, but it does suggest the universe could keep expanding forever, at an accelerating pace.
There's something comforting about the idea of an ever-expanding universe. It sounds so hopeful. But don't celebrate just yet. Before the universe fades to black, Earth has some other doomsdays to dodge. According to one theory, there's an asteroid about seven-tenths of a mile wide that has Earth's name on it. There are decent odds (1 in 300) that it's headed for an apocalyptic collision with Earth on March 16, 2880, according to an article in the journal Science that appeared last April. Even if it misses, there's a consensus that the sun will flame out in, say, 4 to 5 billion years, causing oceans to boil and organisms--that's us--to broil.
Even if all that doesn't happen--or if humans find a way to travel to the stars and avoid annihilation--the ever-expanding universe suggested by the new NASA data leaves something to be desired. Specifically, people. That's because the new data suggest an expanding universe will eventually run out of energy and die a "slow, cold death," one scientist said.
Some may find contemplating the end of the universe a bit depressing. But they're missing the beauty of it. It's a great mystery. There's the Big Bang, and then the Big--what? Whimper?
We live in a culture obsessed with beginnings and endings. But right now, we're somewhere in the opening chapters. The universe is still unfolding. We don't know how it began. We don't know how it will end. It's kept some of the best modern minds--Einstein, Hawking--guessing.
"We know much and understand little," says University of Chicago cosmologist Michael Turner.
That's why it's nice to ponder these imponderables once in a while, if only to give our lives a bit of perspective. Whatever is bothering you, it probably won't much matter when the universe slowly goes dark and cold in few trillion years.
Have a nice day.
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21 Shkurt 2003 15:39
Forumi Horizont > Shkenca > Fizikė dhe Astronomi > universi
