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Dark Matter

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NEWS
April 5, 2013 | By John Heilprin and Seth Borenstein, Associated Press
GENEVA, Switzerland - It is one of the cosmos' most mysterious unsolved cases: dark matter. It is supposedly what holds the universe together. We can't see it, but scientists are pretty sure it's out there. Led by a dogged, Nobel-winning gumshoe who has spent 18 years on the case, scientists put a $2 billion detector aboard the International Space Station to try to track down the stuff. And after two years, the first evidence came in Wednesday: tantalizing cosmic footprints that seem to have been left by dark matter.
NEWS
February 26, 2000 | By Faye Flam, INQUIRER STAFF WRITER
Scientists have searched for years for evidence of "dark matter," invisible particles that are believed to make up far more of the universe - from here to there to everywhere - than what we can actually see. Astronomers are sure it exists because they can see its effects millions of light-years away. Out there, a giant sea of dark matter appears to exert a gravitational pull strong enough to move whole galaxies, like so many leaves swept along in a current. Particle physicists have predicted that it would be found on Earth in the form of new particles that exhibit the requisite slippery properties of the dark matter.
NEWS
April 19, 1995 | By Faye Flam, INQUIRER STAFF WRITER
A team of astronomers yesterday claimed the first definitive detection of objects making up the elusive "dark matter," long believed to lurk between the stars. The identity of dark matter is one of the biggest mysteries facing astronomers in their quest to understand the nature of the universe. The speculated dark matter is, by definition, invisible. Therefore, astronomers from Livermore National Laboratory, along with collaborators from Britain and Australia, used an indirect technique - looking for distorting effects that dark matter would have on light coming to Earth from more distant stars.
NEWS
January 12, 1993 | By CHARLES KRAUTHAMMER
The news from physics is not good. It seems that an X-ray satellite has detected evidence of enormous amounts of "dark matter" in the far reaches of space, perhaps enough to stop the expansion of the universe and cause its eventual extinction in the Big Crunch, a spectacular reversal of our birth in the Big Bang. Some people find this news depressing because it foretells the End. What I find more depressing is the vast universe of ignorance illuminated by these flashes from physics.
NEWS
January 7, 1999 | By Faye Flam, INQUIRER STAFF WRITER
Drifting among the universe's shining collections of stars may be vast swarms of invisible "ghost galaxies," made up of mysterious dark matter. But proving these ghost galaxies really exist will be no easy task since, by definition, they have too few stars to be seen, said University of Hawaii astronomer John Kormendy. Kormendy said he has seen a number of almost invisible galaxies. He has also noticed a pattern: Dimmer galaxies are more abundant than bright ones, and the very dimmest are more abundant still.
NEWS
January 8, 1993
The headlines looked like something the principal characters in an old science-fiction movie might be confronted with in an early scene: "Astronomers discover mysterious 'dark matter,' " read The Inquirer's front page on Tuesday. "X-ray data suggest mass of the universe may halt expansion," the New York Times reported. The Washington Post said, "Satellite finds dark matter that may bind the universe. " (To one friend, the Post headline seemed to go too far toward combining astrophysics and cooking advice.
NEWS
March 7, 2000
Back in the 1900s - 1996 to be exact - a science writer published a seriously reviewed tome titled The End of Science. Author John Hogan's thesis was that human beings had discovered all the important stuff - airplanes, nuclear energy, DNA, computers. Future learning would, essentially, be on the margins. Or so he said. Boy, was he wrong. For centuries, much of our learning has been about understanding the world of matter that we can see, touch and feel. Only makes sense, right?
NEWS
June 24, 2012 | By Amber Hunt, Associated Press
LEAD, S.D. - Nestled nearly 5,000 feet beneath the earth in the gold boom town of Lead, S.D., is a laboratory that could help scientists answer some pretty heavy questions about life, its origins, and the universe. It's hard to spot from the surface. Looking around the rustic town, there are far more nods to its mining past than to its scientific future. But on Wednesday, when part of the Homestake Gold Mine officially became an underground campus, Lead became the place where the elusive stuff called dark matter might finally be detected.
LIVING
November 21, 1994 | By Robert S. Boyd, INQUIRER WASHINGTON BUREAU
The keen eyes of the Hubble Space Telescope are shattering scientists' pet theories about two fundamental questions about the universe: What is it made of? And how old is it? Last week, astronomers said new photographs from Hubble rule out the widely held belief that dim red stars five to 10 times smaller than the sun make up most of the invisible matter in the universe. Only about 10 percent of the mass of the universe is visible. The rest is so-called dark matter - a mysterious substance that has baffled scientists since it was theorized 60 years ago. "It's embarrassing for astronomers to admit we can't find 90 percent of the matter in universe," said Bruce Margon, chairman of the astronomy department at the University of Washington in Seattle.
NEWS
December 1, 1995
Astronomers, those patient lords of the lens, are quivering over the first photographic proof of a phenomenon known as a "failed star. " In Planet Hollywood, of course, such things are an everyday occurrence. ("Paging Mr. Stallone, paging Mr. Stallone. Ms. Julia Roberts, please call your agent. ") But, to astronomers, confirmation of their theory that the vastness of space includes objects that are much larger than Jupiter, but lack the sizzle to shine like a star, is a big deal.
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ARTICLES BY DATE
NEWS
April 5, 2013 | By John Heilprin and Seth Borenstein, Associated Press
GENEVA, Switzerland - It is one of the cosmos' most mysterious unsolved cases: dark matter. It is supposedly what holds the universe together. We can't see it, but scientists are pretty sure it's out there. Led by a dogged, Nobel-winning gumshoe who has spent 18 years on the case, scientists put a $2 billion detector aboard the International Space Station to try to track down the stuff. And after two years, the first evidence came in Wednesday: tantalizing cosmic footprints that seem to have been left by dark matter.
ENTERTAINMENT
February 19, 2013
Human genes seem to be activated by stretches of DNA found in between the genes but not very close to them. Each activator is often located thousands of base pairs away from its corresponding gene, so scientists have been puzzled as to just how they get the job done. Researchers at Wistar Institute reported on Sunday that they had found part of the answer: At the appropriate moment, each gene and its activator come together as if the DNA were string being tied into a loop. The findings help to explain what occurs during embryonic development, when the pinpoint timing of gene activation plays a role in whether a cell becomes part of, say, a liver or a heart, and even whether the organism is a human or another species.
NEWS
June 24, 2012 | By Amber Hunt, Associated Press
LEAD, S.D. - Nestled nearly 5,000 feet beneath the earth in the gold boom town of Lead, S.D., is a laboratory that could help scientists answer some pretty heavy questions about life, its origins, and the universe. It's hard to spot from the surface. Looking around the rustic town, there are far more nods to its mining past than to its scientific future. But on Wednesday, when part of the Homestake Gold Mine officially became an underground campus, Lead became the place where the elusive stuff called dark matter might finally be detected.
NEWS
January 11, 2004 | Robert S. Boyd covers science for The Inquirer's Washington Bureau
Scientists are on a quest to solve one of the biggest mysteries in the universe: "dark energy," an eerie repulsive force that's driving stars and galaxies apart at ever-increasing speeds. Discovered only five years ago, this bizarre form of energy makes up 73 percent of the mass of the universe, astronomers say. Ordinary matter, the stuff of planets, trees, people and mosquitoes, accounts for only 4 percent. The remaining 23 percent is "dark matter," ghostly particles that are presumed to exist, but have never been seen.
NEWS
February 18, 2003 | By David Spergel
What you're seeing is an image taken by the Wilkinson Microwave Anisotropy Probe (WMAP), a NASA satellite built at Princeton University and at Goddard Space Flight Center. The satellite, named after our late colleague David Wilkinson, orbits the sun and is nearly a million miles away from Earth. WMAP scans the microwave sky ? the patterns of all the cosmic microwave radiation in the sky. The image shows the entire sky, in an oval projection similar to that in maps that show the entire Earth on a single map. This image is a picture of the cosmic background radiation, the oldest light in the universe.
NEWS
March 7, 2000
Back in the 1900s - 1996 to be exact - a science writer published a seriously reviewed tome titled The End of Science. Author John Hogan's thesis was that human beings had discovered all the important stuff - airplanes, nuclear energy, DNA, computers. Future learning would, essentially, be on the margins. Or so he said. Boy, was he wrong. For centuries, much of our learning has been about understanding the world of matter that we can see, touch and feel. Only makes sense, right?
NEWS
February 26, 2000 | By Faye Flam, INQUIRER STAFF WRITER
Scientists have searched for years for evidence of "dark matter," invisible particles that are believed to make up far more of the universe - from here to there to everywhere - than what we can actually see. Astronomers are sure it exists because they can see its effects millions of light-years away. Out there, a giant sea of dark matter appears to exert a gravitational pull strong enough to move whole galaxies, like so many leaves swept along in a current. Particle physicists have predicted that it would be found on Earth in the form of new particles that exhibit the requisite slippery properties of the dark matter.
NEWS
January 7, 1999 | By Faye Flam, INQUIRER STAFF WRITER
Drifting among the universe's shining collections of stars may be vast swarms of invisible "ghost galaxies," made up of mysterious dark matter. But proving these ghost galaxies really exist will be no easy task since, by definition, they have too few stars to be seen, said University of Hawaii astronomer John Kormendy. Kormendy said he has seen a number of almost invisible galaxies. He has also noticed a pattern: Dimmer galaxies are more abundant than bright ones, and the very dimmest are more abundant still.
LIVING
October 3, 1998 | By Daniel Webster, INQUIRER MUSIC CRITIC
Relache moved into Franklin Institute last night, music and electronics rubbing sides in a concert that was broadcast on the Internet. The instrumental ensemble has been at the edge of musical exploration, adapting electronics as the seasons went by. Now the musicians have taken a comfortable place in an atmosphere shaped by computer-generated sounds, improvizations and a mix of sound on tape and projected on screens. The centerpiece was William Duckworth's Dreaming Dances, Round and Square.
NEWS
August 20, 1998 | By Seth Borenstein, INQUIRER WASHINGTON BUREAU
A little extra twinkle of some stars may be shining light on one of astronomy's darkest mysteries: Where is the 90 percent of our galaxy that appears to be missing? For two decades, astronomers have believed that the galaxy has a lot more mass than is visible, because outer stars are speeding around as if the galaxy weighs a lot more. Astronomers trying to track down the missing stuff call it dark matter. A team of American and Australian astronomers believes periodic spurts of extra light from distant stars provide evidence that could help account for about half the missing parts of the Milky Way. Something is causing these stars to brighten incredibly for about 80 days, and that something is probably the same dark matter that accounts for the galaxy's hidden weight, said team leader Charles Alcock of the Lawrence Livermore Laboratory.
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