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Keyword: darkmatter

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  • Space shock as 'unidentified object' feeding mysterious black hole leaves experts baffled

    10/16/2019 10:46:11 AM PDT · by Innovative · 37 replies
    UK Express ^ | Oct. 16, 2019 | Brian McGleenon
    A MYSTERIOUS supermassive black hole in a distant galaxy is spitting high energy particles after being fed by an object that has never been seen before. The baffling phenomenon has put existing theoretical models on their head, and astrophysicists are puzzled as to what is creating such a regular excretion of material from within the bowels of this supermassive black hole. According to the paper titled, 'Nine-hour X-ray quasi-periodic eruptions from a low-mass black hole galactic nucleus', the energy erupts from the black hole every nine hours and last for one hour and it's that precision which has baffled scientists.
  • There's a Huge Void Near Our Galaxy. Its Mysterious Depths Have Just Been Measured

    07/23/2019 4:59:42 PM PDT · by BenLurkin · 14 replies
    sciencealert.com ^ | 23 JUL 2019 | EVAN GOUGH, UNIVERSE TODAY
    Our Milky Way galaxy is part of a group of galaxies called the Local Group. The Local Group is dominated by the Milky Way and its larger sibling, the Andromeda Galaxy. The many dwarf galaxies clinging gravitationally to the Milky Way and Andromeda round out the Local Group's population. The Local Group itself is part of an even larger structure, called the Laniakea Super-Cluster, which contains over 100,000 galaxies. Local Group and nearest galaxies. (Wikipedia Commons/Antonio Ciccolella) The new study is titled "Cosmicflows-3: Cosmography of the Local Void." Cosmicflows-3 is a compendium of over 17,000 galaxy distances in our cosmic...
  • NASA Says Indian Scientist's Theory Is Correct, Black Holes Don't Really Exist

    11/29/2015 4:24:52 PM PST · by Jyotishi · 49 replies
    India Times ^ | November 27, 2015 | Bobins Abraham
    American space agency, the NASA had recently observed flares of X-rays from a black hole, which goes against the conventional notion that they are compact particles with such huge gravity that even light can't escape. Last month NASA announced that two of its space telescopes caught a huge burst of X-ray spewing out of a super massive black hole. These flairs appeared to be be triggered by the eruption of a charged particle from the black hole, which according to conventional belief doesn't let anything out. The latest findings are in accordance with the theory of Indian astrophysicist Abhas Mitra...
  • Stephen Hawking was right: 'Black hole' created in a lab confirms the late physicist's [tr]

    05/30/2019 3:59:10 AM PDT · by C19fan · 29 replies
    UK Daily Mail ^ | May 29, 2019 | James Pero
    After the first-ever image of a black hole confirmed theories posited by Einstein, it's the late scientist Stephen Hawking's turn to have parts of his life's work vindicated. In a paper published in Nature, scientists say that have verified the scientist's namesake theory, Hawking Radiation, which hypothesized that black holes emit radiation from their surfaces due to a mix of different factors regarding quantum physics and gravity. To verify the theory, scientists at the Technion-Israel Institute of Technology turned to what sounds like mad science: creating their own black hole.
  • The universe may be a billion years younger than we thought. Scientists are scrambling...

    05/19/2019 7:11:57 AM PDT · by BenLurkin · 69 replies
    NBC ^ | May 18, 2019, | Corey S. Powell
    By 2013, the European Planck space telescope's detailed measurements of cosmic radiation seemed to have yielded the final answer: 13.8 billion years old. All that was left to do was to verify that number using independent observations of bright stars in other galaxies. Then came an unexpected turn of events. A few teams, including one led by Nobel laureate Adam Riess of the Space Telescope Science Institute in Baltimore, set out to make those observations. Instead of confirming Planck's measurements, they started getting a distinctly different result. At first, the common assumption was that Riess and the other galaxy-watchers had...
  • Something Strange Punched a Hole in the Milky Way. But What Exactly Is It?

    05/16/2019 7:52:15 AM PDT · by BenLurkin · 47 replies
    There's a "dark impactor" blasting holes in our galaxy. Stellar streams are lines of stars moving together across galaxies, often originating in smaller blobs of stars that collided with the galaxy in question. Under normal conditions, the stream should be more or less a single line, stretched out by our galaxy's gravity, she said in her presentation. Astronomers would expect a single gap in the stream, at the point where the original globular cluster was before its stars drifted away in two directions. But Bonaca showed that GD-1 has a second gap. And that gap has a ragged edge —...
  • Telescopes and Theodicy

    05/19/2019 5:55:15 AM PDT · by Kaslin · 24 replies
    Townhall.com ^ | May 19, 2019 | Marvin Olasky
    If you havenÂ’t taken a science course since high school or college decades ago, hereÂ’s some news: We know a lot less now about the basic makeup of the universe than we thought we did then. Several decades ago scientists knew the universe was expanding. They believed the expansion had to slow down. No astronomer had observed such slowing but it had to happen because the universe is full of matter, matter has gravity, and gravity pulls things together. In 1998, though, the Hubble Space Telescope let us look at very distant stars. It became apparent that the universe was...
  • Black holes' magnetism surprisingly wimpy

    12/07/2017 2:52:50 PM PST · by LibWhacker · 23 replies
    ScienceDaily ^ | 12/7/17
    Black holes are famous for their muscle: an intense gravitational pull known to gobble up entire stars and launch streams of matter into space at almost the speed of light. It turns out the reality may not live up to the hype. In a paper published today in the journal Science, University of Florida scientists have discovered these tears in the fabric of the universe have significantly weaker magnetic fields than previously thought. A 40-mile-wide black hole 8,000 light years from Earth named V404 Cygni yielded the first precise measurements of the magnetic field that surrounds the deepest wells of...
  • Dark matter exists: Observations disprove alternate explanations

    04/30/2019 8:34:49 PM PDT · by ETL · 26 replies
    Phys.org ^ | International School of Advanced Studies (SISSA)
    Acceleration as a function of radius in NGC 4455, one of the studied galaxies As fascinating as it is mysterious, dark matter is one of the greatest enigmas of astrophysics and cosmologyIt is thought to account for 90 percent of the matter in the universe, but its existence has been demonstrated only indirectly, and has recently been called into question New research conducted by SISSA removes the recent doubts on the presence of dark matter within galaxies, disproving the empirical relations in support of alternative theories. The study, published in the Astrophysical Journal, also offers new insights into understanding the...
  • One of Stephen Hawking's Most Famous Theories About Black Holes Just Suffered a Huge Blow

    04/25/2019 7:37:31 AM PDT · by Red Badger · 127 replies
    www.livescience.com ^ | April 25, 2019 07:15am ET | By Meredith Fore
    One of Stephen Hawking's most famous theories about dark matter — that this mysterious and invisible substance is made up of primordial black holes — recently suffered a huge blow. That conclusion comes from a massive telescope that captured an image of an entire galaxy in one shot. The findings don't completely rule out Stephen Hawking's famous notion. But they suggest that primordial black holes would have to be truly tiny to explain dark matter. Dark matter mystery Dark matter is the name given by physicists to explain a particularly mysterious phenomenon: Everything in the universe moves, orbits and rotates...
  • Dark Matter is Real. “Dark Matter” is a Terrible Name for It

    04/03/2019 3:25:28 PM PDT · by LibWhacker · 63 replies
    Discover Magazine ^ | 4/1/19 | Corey S. Powell
    Astronomers have been grappling with the mystery of dark matter for a long time, and I mean a looong time. The history of dark-matter investigations goes back at least to 1906, when physicist Henri Poincaré’s 1906 speculated about the amount of “matière obscure” in the Milky Way. Or really, it goes to back to 1846 and the first successful detection of dark matter: the discovery of the planet Neptune, whose existence had been inferred by its gravitational pull well before it was actually observed. Since then, scientists have identified many different dark components in space: collapsed stars, interstellar dust, hot...
  • NASA accurately calculates Milky Way's weight using Gaia, Hubble telescopes

    03/09/2019 10:18:12 AM PST · by ETL · 47 replies
    FoxNews.com/Science ^ | Mar 8, 2019 | Ann W. Schmidt | Fox News
    Scientists have finally been able to accurately calculate the weight of the Milky Way, overcoming the difficult hurdle of measuring dark matter, the European Space Agency (ESA) announced Thursday. After years of struggling to estimate the size of our galaxy, astronomers with NASA and the ESA used data from the Hubble Space Telescope and the ESA’s Gaia mission to determine the Milky Way weighs about 1.5 trillion solar masses within a radius of 129,000 light years from the center. Because dark matter makes up about 90 percent of the galaxy, estimates of the Milky Way’s weight have differed widely in...
  • New Map of Dark Matter Spanning 10 Million Galaxies Hints at a Flaw in Our Physics

    02/15/2019 8:12:19 AM PST · by BenLurkin · 48 replies
    Science Alert ^ | 14 FEB 2019 | MICHELLE STARR
    An invisible force is having an effect on our Universe. We can't see it, and we can't detect it - but we can observe how it interacts gravitationally with the things we can see and detect, such as light. Now an international team of astronomers has used one of the world's most powerful telescopes to analyse that effect across 10 million galaxies in the context of Einstein's general relativity. The result? The most comprehensive map of dark matter across the history of the Universe to date. ... "If further data shows we're definitely right, then it suggests something is missing...
  • A Brief History of Black Holes

    12/29/2018 5:39:27 PM PST · by MtnClimber · 18 replies
    Real Clear Science ^ | 29 Dec, 2018 | Carla Rodrigues Almeida
    Late in 2018, the gravitational wave observatory, LIGO, announced that they had detected the most distant and massive source of ripples of spacetime ever monitored: waves triggered by pairs of black holes colliding in deep space. Only since 2015 have we been able to observe these invisible astronomical bodies, which can be detected only by their gravitational attraction. The history of our hunt for these enigmatic objects traces back to the 18th century, but the crucial phase took place in a suitably dark period of human history – World War II. The concept of a body that would trap light,...
  • Matter Sucked in by Black Holes May Travel into the Future, Get Spit Back Out

    12/21/2018 12:36:00 PM PST · by ETL · 82 replies
    LiveScience.com ^ | Dec 18, 2018 | Don Lincoln, Senior Scientist, Fermi National Accelerator Laboratory; Adjunct Professor of Physics
    Black holes are among the most mysterious places in the universe; locations where the very fabric of space and time are warped so badly that not even light can escape from them. According to Einstein's theory of general relativity, at their center lies a singularity, a place where the mass of many stars is crushed into a volume with exactly zero size. However, two recent physics papers, published on Dec.10 in the journals Physical Review Letters and Physical Review D, respectively, may make scientists reconsider what we think we know about black holes. Black holes might not last forever, and...
  • Bringing balance to the universe: New theory could explain missing 95 percent of the cosmos

    12/05/2018 9:02:07 AM PST · by ETL · 89 replies
    Scientists at the University of Oxford may have solved one of the biggest questions in modern physics, with a new paper unifying dark matter and dark energy into a single phenomenon: a fluid which possesses 'negative mass." If you were to push a negative mass, it would accelerate towards you. This astonishing new theory may also prove right a prediction that Einstein made 100 years ago. Our current, widely recognised model of the Universe, called LambdaCDM, tells us nothing about what dark matter and dark energy are like physically. We only know about them because of the gravitational effects they...
  • Discovery of Hotspots Circling Milky Way Black Hole Has Astronomers Excited

    11/21/2018 7:58:43 AM PST · by BenLurkin · 30 replies
    Space.com ^ | November 21, 2018 08:00am ET | Samantha Mathewson,
    Broderick's work builds on earlier research by two teams that studied the galactic center of the Milky Way in near-infrared. This included the work of Reinhard Genzel, an astronomer from the Max Planck Institute for Extraterrestrial Physics in Garching, Germany, as well as researchers Andrea Ghez and Mark Morris of University of California, Los Angeles. At the time, their work revealed that the center of the Milky Way wasn't steady, but instead would drastically brighten about once a day for about 30 or 40 minutes, Broderick said. Researchers think supermassive black holes exist at the center of most, if not...
  • Large, strangely dim galaxy found lurking on far side of Milky Way

    11/13/2018 10:17:10 AM PST · by ETL · 15 replies
    ScienceMag.com ^ | Nov 13, 201 | Adam Mann
    Circling our galaxy is a stealthy giant. Astronomers have discovered a dwarf galaxy, called Antlia 2, that is one-third the size of the Milky Way itself. As big as the Large Magellanic Cloud, the galaxy’s largest companion, Antlia 2 eluded detection until now because it is 10,000 times fainter. Such a strange beast challenges models of galaxy formation and dark matter, the unseen stuff that helps pull galaxies together. “It’s a very odd object and kind of exciting because we don’t know yet how to interpret all of its properties,” says Andrey Kravtsov of The University of Chicago in Illinois,...
  • Signs of Earth's Weird, Elusive 'Dust Moons' Finally Spotted

    11/07/2018 8:30:59 AM PST · by ETL · 17 replies
    Space.com ^ | Oct 31, 2018 | Charles Q. Choi, Space.com Contributor
    Dust clouds that orbit Earth like moons may finally have had their existence confirmed after more than a half-century of controversy, new research finds. In deep space, there are five points where the gravitational pull of Earth and the moon balance each other. Two of these so-called Lagrange points, L4 and L5, form an equal-sided triangle with Earth and the moon, and move around Earth as the moon orbits the planet. Any objects at either L4 or L5 can stay in relatively stable positions there about 239,000 miles (384,000 kilometers) from both Earth and the moon, barring any interference from...
  • Bringing Dark Energy Out into the Light

    10/28/2018 1:28:32 PM PDT · by ETL · 32 replies
    Space.com ^ | Oct 18, 2018 | Paul Sutter, Astrophysicist
    Let's talk about dark energy. We've known for about 20 years that the expansion of our universe is accelerating; every day, our cosmos grows bigger and bigger, doing so faster and faster. It's a subtle effect, and it takes extensive and deep cosmological surveys and studies for scientists to notice it. But multiple independent lines of evidence all point to the same conclusion: accelerating expansion. Astronomers quickly cooked up a cool name for that accelerated expansion: dark energy. But now we’re left with the much harder job of finding a culprit — what's causing it? A universal mistake We use...