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03-17-2014, 05:14 PM | |
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Scientists find cosmic ripples from birth of universe
Scientists find cosmic ripples from birth of universe
Published March 17, 2014 Astronomers have discovered what they believe is the first direct evidence of the astonishing expansion of the universe in the instant following the Big Bang -- the scientific explanation for the birth of the universe some 13.8 billion years ago. Scientists believe that the universe exploded from a tiny speck and hurled itself out in all directions in the fraction of a second that followed, beginning just 10 to the minus 35 seconds (roughly one trillionth of a trillionth of a trillionth of a second) after the universe's birth. Matter ultimately coalesced hundreds of millions of years later into planets, stars, and ultimately us. And like ripples from a ball kicked into a pond, that Big Bang-fueled expansion caused ripples in the ancient light from that event, light which remains imprinted in the skies in a leftover glow called the cosmic microwave background. Scientists still don’t know who kicked the ball. But if confirmed, the newfound ripples would be amazing proof of what has long been mere theory about what happened in those first millionths of a second. “The implications for this detection stagger the mind,” said Jamie Bock, professor of physics at Caltech, laboratory senior research scientist at the Jet Propulsion Laboratory (JPL) and project co-leader. “We are measuring a signal that comes from the dawn of time.” "It would be the most important discovery since the discovery, I think, that the expansion of the universe is accelerating," Harvard astronomer Avi Loeb, who is not a member of the study team, told Space.com. He compared the finding to a 1998 observation that opened the window on mysterious dark energy and won three researchers the 2011 Nobel Prize in physics. The groundbreaking results came from observations by BICEP2, a telescope at the South Pole, of the cosmic microwave background -- a faint glow left over from the Big Bang. Beginning a fraction of a fraction of a second after the universe's birth, according to the current theory, space-time expanded incredibly rapidly, ballooning outward faster than the speed of light. The afterglow from that expansion is called the cosmic microwave background, and tiny fluctuations in it provide clues to conditions in the early universe. For example, small differences in temperature across the sky show where parts of the universe were denser, eventually condensing into galaxies and galactic clusters. Since the cosmic microwave background is a form of light, it exhibits all the properties of light, including polarization. On Earth, sunlight is scattered by the atmosphere and becomes polarized, which is why polarized sunglasses help reduce glare. In space, the cosmic microwave background was scattered by atoms and electrons and became polarized too. “Our team hunted for a special type of polarization called ‘B-modes,’ which represents a twisting or ‘curl’ pattern in the polarized orientations of the ancient light,” said Bock. The team presented their work at a press conference Monda at Harvard -- the discovery of that characteristic pattern of polarization in the skies, which they called proof of the gravitational waves across the primordial sky. “This work offers new insights into some of our most basic questions: Why do we exist? How did the universe begin? These results are not only a smoking gun for inflation, they also tell us when inflation took place and how powerful the process was,” Harvard theorist Avi Loeb said. |
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03-19-2014, 02:22 AM | #121 | |
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If you can accept that and a higher being, kudos, you believe what I do. If you can't I repeat, kudos, I can't speak for you. |
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03-19-2014, 03:37 AM | #122 | |
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So it's easy to correlate that "evolution" into "special" qualities. Now is that just happenstance, primortal sludge going our way, or a devine design. We don't know, we think either science or religion points respective directions but in truth we just don't know. It could be one or the other, maybe something we haven't thought of or "discovered" yet, or some combination of those. So we mask this primal ignorance into beliefs; of religion or science or some combination, so we can "explain" the truth we can't even comprehend (or may be ever able to comprehend) |
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03-19-2014, 03:38 AM | #123 |
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Oh and iirc penguins are the only other mammal having sex for pleasure. Or so scientists say....
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03-19-2014, 05:40 AM | #124 | |
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But, that's not true. There is a ton that the human mind is capable of that no other creature has. Humans, more importantly the human mind is the coolest thing ever. |
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03-19-2014, 05:47 AM | #125 | |
'Tis my eye!
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Put this thread in DC where it belongs. |
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03-19-2014, 06:01 AM | #126 |
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03-19-2014, 07:49 AM | #127 | |||||||
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Quote:
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Here's the same question by another poster: Quote:
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03-19-2014, 07:54 AM | #128 |
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yep, how can an expanding universe be expanding into nothing?
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03-19-2014, 08:04 AM | #129 | |
Ain't no relax!
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All throughout the animal kingdom there are other animals that do most everything that humans do. In most cases, they do it better. The mantis shrimp has eyes that completely put human eyes to shame by a huge huge margin. Most underwater species have better vision that humans. Human strength is nothing compared to other similar sized species. We're slower than most other species. Every animal is uniquely special in some way. Humans simply have a deeper intellect than others. And if we look back at our evolutionary history, we can even pinpoint the time in the past where we reached that intellect. We can see when we figured out how to use fire, how to use tools, how to hunt using teamwork, etc. The interesting thing is that we can see other species in their own stages of learning these things. We can see other birds and mammals using tools, using teamwork. We can see the process in action. Humans certainly have a special quality. Just like all the other animals.
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03-19-2014, 08:12 AM | #130 | |
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03-19-2014, 08:19 AM | #131 | |
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Yesterday's magic often becomes tomorrow's science.
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03-19-2014, 08:22 AM | #132 |
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Humans accumulate knowledge over generations. Learning, not just from own own past, but that of our ancestors is a special thing.
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03-19-2014, 08:22 AM | #133 | |
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03-19-2014, 08:25 AM | #134 | |
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03-19-2014, 08:29 AM | #135 |
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Boy, this thread went from "Wow, cool...science!" to DC in no time.
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