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Gravitational waves have been found
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<blockquote data-quote="Opmmur" data-source="post: 123603" data-attributes="member: 13"><p><span style="font-size: 26px"><span style="color: #00ff00"><strong><em>Gravitational waves have been found, scientists say</em></strong></span></span></p><p><a href="http://www.cnn.com/profiles/todd-leopold-profile" target="_blank"><img src="http://i2.cdn.turner.com/cnnnext/dam/assets/140929121226-todd-leopold-profile-image-small-11.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </a></p><p>By <a href="http://www.cnn.com/profiles/todd-leopold-profile" target="_blank"><u>Todd Leopold</u></a>, CNN</p><p></p><p></p><p><img src="http://i2.cdn.turner.com/cnnnext/dam/assets/160210131155-gravitational-waves-large-169.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">Now Playing Gravitational waves: The... </span></span></em></p><p><span style="font-size: 18px"><span style="color: #00ff00"><strong><em> (24 Videos)</em></strong></span></span></p><p><a href="http://edition.cnn.com/2015/08/28/tech/mars-photos-alien-life/" target="_blank"></a></p><p><a href="http://edition.cnn.com/2015/08/28/tech/mars-photos-alien-life/" target="_blank"><u><em><span style="font-size: 18px"><span style="color: #00ff00">Life on Mars: Depends on what you see in this picture</span></span></em></u></a></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">Reitze said one black hole had the mass of 29 suns; the other was the equivalent of 36 suns. Each was perhaps 150 kilometers (90 miles) in diameter, he said.</span></span></em></p><p></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">Read More</span></span></em></p><p><span style="font-size: 18px"><span style="color: #00ff00"><strong><em>Gravitational waves 'like Jell-O'</em></strong></span></span></p><p></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">The two collided at half the speed of light. The event occurred approximately 1.3 billion years ago. Gravitational waves pass through everything, so the result traveled through the universe for that time before reaching Earth.</span></span></em></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">The gravitational waves stretched and compressed space around Earth "like Jell-O."</span></span></em></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">However, the waves are so small they need a detector like LIGO, capable of measuring distortions one-thousandth the size of a proton, to observe them. They were observed on September 14, 2015.</span></span></em></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">Scientists heard the sound of the black holes colliding as a "chirp" lasting one-fifth of a second.</span></span></em></p><p></p><p><span style="font-size: 18px"><span style="color: #00ff00"><strong><em>Einstein would be surprised</em></strong></span></span></p><p></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">Gravitational waves were predicted by Einstein in his general theory of relativity in 1915. However, in order for us to detect them, they needed to be created by a mammoth event -- like, for example, the collision of two black holes.</span></span></em></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">Black holes, gravitational areas so massive that nothing -- not even light -- can escape, are a holy grail of the gravitational wave concept. To date, we'd been able only to see their aftereffects -- black holes themselves were a conjecture. Discovery of gravitational waves confirms their existence.</span></span></em></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">Ironically, Einstein didn't think gravitational waves would ever be discovered.</span></span></em></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">"He thought gravitational waves are a beautiful construct, but they are so small nobody would ever be able to actually measure it," said Szabolcs Marka, a physics professor at Columbia University.</span></span></em></p><p></p><p><span style="font-size: 18px"><span style="color: #00ff00"><strong><em>'A window on the universe'</em></strong></span></span></p><p></p><p></p><p><a href="http://www.ligo.org/news/media-advisory.php" target="_blank"><u><em><span style="font-size: 18px"><span style="color: #00ff00">LIGO is described in a statement</span></span></em></u></a><em><span style="font-size: 18px"><span style="color: #00ff00"> as "a system of two identical detectors" -- one located in Livingston, Louisiana, the other in Hanford, Washington -- "carefully constructed to detect incredibly tiny vibrations from passing gravitational waves." The project was created by scientists from Caltech and MIT and funded by the National Science Foundation.</span></span></em></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">"What's really exciting is what comes next," said Reitze. "I think we're opening a window on the universe -- a window of gravitational wave astronomy."</span></span></em></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">Marka told CNN that "we will be able to study not just Einstein's general relativity -- we'll be able to find objects we only imagined would exist. We should see a universe that has never been observed before."</span></span></em></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">Marka said to think of LIGO as a "cosmic microphone," an incredibly precise listening device that can detect distortions in space-time, the fabric of the universe. It's so precise it can detect changes the size of a soccer ball in the entire Milky Way galaxy.</span></span></em></p><p></p><p><span style="font-size: 18px"><span style="color: #00ff00"><strong><em>'The secret life of black holes'</em></strong></span></span></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">The discovery of gravitational waves is like opening another of our senses, Marka told CNN's Rachel Crane: hearing the universe as well as seeing it.</span></span></em></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">"And when we hear the universe, we will learn about the secret life of black holes -- their birth, their death, their marriage, their feeding. We will hear when a black hole eats a neutron star," Marka said. "Nobody has 'seen' that before. We will not only understand it, we will 'see' it. It's the most fascinating thing I can imagine."</span></span></em></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">Indeed, black holes are a holy grail of the gravitational wave concept. To date, we've been able only to see their aftereffects -- black holes themselves remain a conjecture. Discovery of gravitational waves would confirm their existence.</span></span></em></p><p></p><p><em><span style="font-size: 18px"><span style="color: #00ff00">"It's the first time the universe has spoken to us through gravitational waves," said Reitze. "Up to now we've been deaf to them."</span></span></em></p></blockquote><p></p>
[QUOTE="Opmmur, post: 123603, member: 13"] [SIZE=7][COLOR=#00ff00][B][I]Gravitational waves have been found, scientists say[/I][/B][/COLOR][/SIZE] [URL='http://www.cnn.com/profiles/todd-leopold-profile'][IMG]http://i2.cdn.turner.com/cnnnext/dam/assets/140929121226-todd-leopold-profile-image-small-11.jpg[/IMG] [/URL] By [URL='http://www.cnn.com/profiles/todd-leopold-profile'][U]Todd Leopold[/U][/URL], CNN [IMG]http://i2.cdn.turner.com/cnnnext/dam/assets/160210131155-gravitational-waves-large-169.jpg[/IMG] [I][SIZE=5][COLOR=#00ff00]Now Playing Gravitational waves: The... [/COLOR][/SIZE][/I] [SIZE=5][COLOR=#00ff00][B][I] (24 Videos)[/I][/B][/COLOR][/SIZE] [URL='http://edition.cnn.com/2015/08/28/tech/mars-photos-alien-life/'] [U][I][SIZE=5][COLOR=#00ff00]Life on Mars: Depends on what you see in this picture[/COLOR][/SIZE][/I][/U][/URL] [I][SIZE=5][COLOR=#00ff00]Reitze said one black hole had the mass of 29 suns; the other was the equivalent of 36 suns. Each was perhaps 150 kilometers (90 miles) in diameter, he said.[/COLOR][/SIZE][/I] [I][SIZE=5][COLOR=#00ff00]Read More[/COLOR][/SIZE][/I] [SIZE=5][COLOR=#00ff00][B][I]Gravitational waves 'like Jell-O'[/I][/B][/COLOR][/SIZE] [I][SIZE=5][COLOR=#00ff00]The two collided at half the speed of light. The event occurred approximately 1.3 billion years ago. Gravitational waves pass through everything, so the result traveled through the universe for that time before reaching Earth.[/COLOR][/SIZE][/I] [I][SIZE=5][COLOR=#00ff00]The gravitational waves stretched and compressed space around Earth "like Jell-O."[/COLOR][/SIZE][/I] [I][SIZE=5][COLOR=#00ff00]However, the waves are so small they need a detector like LIGO, capable of measuring distortions one-thousandth the size of a proton, to observe them. They were observed on September 14, 2015.[/COLOR][/SIZE][/I] [I][SIZE=5][COLOR=#00ff00]Scientists heard the sound of the black holes colliding as a "chirp" lasting one-fifth of a second.[/COLOR][/SIZE][/I] [SIZE=5][COLOR=#00ff00][B][I]Einstein would be surprised[/I][/B][/COLOR][/SIZE] [I][SIZE=5][COLOR=#00ff00]Gravitational waves were predicted by Einstein in his general theory of relativity in 1915. However, in order for us to detect them, they needed to be created by a mammoth event -- like, for example, the collision of two black holes.[/COLOR][/SIZE][/I] [I][SIZE=5][COLOR=#00ff00]Black holes, gravitational areas so massive that nothing -- not even light -- can escape, are a holy grail of the gravitational wave concept. To date, we'd been able only to see their aftereffects -- black holes themselves were a conjecture. Discovery of gravitational waves confirms their existence.[/COLOR][/SIZE][/I] [I][SIZE=5][COLOR=#00ff00]Ironically, Einstein didn't think gravitational waves would ever be discovered.[/COLOR][/SIZE][/I] [I][SIZE=5][COLOR=#00ff00]"He thought gravitational waves are a beautiful construct, but they are so small nobody would ever be able to actually measure it," said Szabolcs Marka, a physics professor at Columbia University.[/COLOR][/SIZE][/I] [SIZE=5][COLOR=#00ff00][B][I]'A window on the universe'[/I][/B][/COLOR][/SIZE] [URL='http://www.ligo.org/news/media-advisory.php'][U][I][SIZE=5][COLOR=#00ff00]LIGO is described in a statement[/COLOR][/SIZE][/I][/U][/URL][I][SIZE=5][COLOR=#00ff00] as "a system of two identical detectors" -- one located in Livingston, Louisiana, the other in Hanford, Washington -- "carefully constructed to detect incredibly tiny vibrations from passing gravitational waves." The project was created by scientists from Caltech and MIT and funded by the National Science Foundation.[/COLOR][/SIZE][/I] [I][SIZE=5][COLOR=#00ff00]"What's really exciting is what comes next," said Reitze. "I think we're opening a window on the universe -- a window of gravitational wave astronomy."[/COLOR][/SIZE][/I] [I][SIZE=5][COLOR=#00ff00]Marka told CNN that "we will be able to study not just Einstein's general relativity -- we'll be able to find objects we only imagined would exist. We should see a universe that has never been observed before."[/COLOR][/SIZE][/I] [I][SIZE=5][COLOR=#00ff00]Marka said to think of LIGO as a "cosmic microphone," an incredibly precise listening device that can detect distortions in space-time, the fabric of the universe. It's so precise it can detect changes the size of a soccer ball in the entire Milky Way galaxy.[/COLOR][/SIZE][/I] [SIZE=5][COLOR=#00ff00][B][I]'The secret life of black holes'[/I][/B][/COLOR][/SIZE] [I][SIZE=5][COLOR=#00ff00]The discovery of gravitational waves is like opening another of our senses, Marka told CNN's Rachel Crane: hearing the universe as well as seeing it.[/COLOR][/SIZE][/I] [I][SIZE=5][COLOR=#00ff00]"And when we hear the universe, we will learn about the secret life of black holes -- their birth, their death, their marriage, their feeding. We will hear when a black hole eats a neutron star," Marka said. "Nobody has 'seen' that before. We will not only understand it, we will 'see' it. It's the most fascinating thing I can imagine."[/COLOR][/SIZE][/I] [I][SIZE=5][COLOR=#00ff00]Indeed, black holes are a holy grail of the gravitational wave concept. To date, we've been able only to see their aftereffects -- black holes themselves remain a conjecture. Discovery of gravitational waves would confirm their existence.[/COLOR][/SIZE][/I] [I][SIZE=5][COLOR=#00ff00]"It's the first time the universe has spoken to us through gravitational waves," said Reitze. "Up to now we've been deaf to them."[/COLOR][/SIZE][/I] [/QUOTE]
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