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Keyword: cosmic

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  • Cosmic rays fired at Earth – now we know where from

    03/17/2016 9:55:45 AM PDT · by LibWhacker · 33 replies
    Cosmos ^ | 3/17/16 | Bill Condie
    Cosmic rays fired at Earth - now we know where from The violent region at the centre of our galaxy is the prime candidate, after gamma ray analysis, Bill Condie reports. Photo montage of gamma-rays as measured by the HESS array on the night sky over Namibia, with one of the small HESS telescopes in the foreground. Credit: H.E.S.S. Collaboration, Fabio Acero and Henning Gast Astronomers believe they may have identified the source of the stream of cosmic rays that rain down on Earth from outer space. Cosmic rays are extremely high-energy particles such as protons and atomic nuclei....
  • Another Year, Another 20 Billion Kilometers Through The Universe

    12/31/2015 6:56:29 PM PST · by LibWhacker · 52 replies
    Scientific American ^ | 12/30/15 | Caleb A. Scharf
    Another year passes. Another 365 planetary spins completed (14.6 million kilometers of combined distance traveled if you live at the Earth's equator), and another journey of 940 million kilometers around the Sun. Time is marked off for us by a largely predictable, if not tedious, set of cycles. Except, this is by no means all the cosmic traveling we've done in the last 31.5 million seconds. For one thing, the solar system is not at rest with respect to its host galaxy. The Sun and its planetary entourage are moving in an orbital path within the Milky Way. The generally...
  • Cosmic Inflation’s Five Great Predictions

    06/22/2015 1:20:00 PM PDT · by LibWhacker · 15 replies ^ | 6/17/15 | Ethan Siegel
    Cosmic Inflation’s Five Great Predictions A “speculative” theory no more; it’s had four of them confirmed. Image credit: Max Tegmark / Scientific American, by Alfred T. Kamajian. “Scientific ideas should be simple, explanatory, predictive. The inflationary multiverse as currently understood appears to have none of those properties.” -Paul Steinhardt, 2014 When we think about the Big Bang, we typically think about the origin of the Universe: the hot, dense, expanding state where everything came from. By noticing and measuring the fact that the Universe is expanding today — that the galaxies are getting farther apart from one another in all directions — we...
  • Cosmic 'lighthouses' could reveal alien life

    08/21/2013 11:02:40 AM PDT · by LibWhacker · 25 replies
    The Telegraph ^ | 8/21/13 | Nick Collins
    Aliens may be trying to communicate with Earth by flashing blinking lasers towards our planet like a cosmic lighthouse, astronomers believe.Laser scientists at the Vienna University of Technology are searching for faint but repetitive light signals from the distant reaches of space, in the hope of identifying signals sent out by extraterrestrials, according to Astrobiology Magazine. Because of their ability to transmit signals over vast distances, lasers have long been considered a possible means of contact by alien species. But while astronomers have searched tens of thousands of stars for laser signals in the past – without identifying any...
  • Ice core data supports ancient space impact idea (cosmic impact about 12,900 years ago?)

    08/01/2013 3:35:01 PM PDT · by NormsRevenge · 9 replies
    BBC News ^ | 8/1/13 | Simon Redfern
    New data from Greenland ice cores suggest North America may have suffered a large cosmic impact about 12,900 years ago. A layer of platinum is seen in ice of the same age as a known abrupt climate transition, US scientists report. The climate flip has previously been linked to the demise of the North American "Clovis" people. The data seem to back the idea that an impact tipped the climate into a colder phase, a point of current debate. Rapid climate change occurred 12,900 years ago, and it is proposed that this is associated with the extinction of large mammals...
  • Swirls in the Afterglow of the Big Bang Could Set Stage for Major Discovery

    07/28/2013 9:51:58 PM PDT · by LibWhacker · 19 replies ^ | 7/25/13 | Adrian Cho
    Scientists have spotted swirling patterns in the radiation lingering from the big bang, the so-called cosmic microwave background (CMB). The observation itself isn't Earth-shaking, as researchers know that these particular swirls or "B-modes" originated in conventional astrophysics, but the result suggests that scientists are closing in on a much bigger prize: B-modes spawned by gravity waves that rippled through the infant universe. That observation would give them a direct peek into the cosmos' first fraction of a second and possibly shed light on how it all began."I see it as a big step forward," says Charles Bennett, a cosmologist...
  • Did An 8th Century Gamma Ray Burst Irradiate Earth?

    01/21/2013 7:50:06 AM PST · by blam · 51 replies
    Science Daily ^ | 1-21-2013 | Science Daily
    Did An 8th Century Gamma Ray Burst Irradiate Earth?Science DailyJanuary 21,2013 A nearby short duration gamma-ray burst may be the cause of an intense blast of high-energy radiation that hit the Earth in the 8th century, according to new research led by astronomers Valeri Hambaryan and Ralph NeuhÓ“user. The two scientists, based at the Astrophysics Institute of the University of Jena in Germany, publish their results in the journal Monthly Notices of the Royal Astronomical Society. In 2012 scientist Fusa Miyake announced the detection of high levels of the isotope Carbon-14 and Beryllium-10 in tree rings formed in 775 CE,...
  • The Cosmic Story of Carbon-14

    06/05/2012 12:48:06 AM PDT · by LibWhacker · 17 replies
    Starts with a Bang ^ | 6/4/12 | Ethan Siegel
    “Life exists in the universe only because the carbon atom possesses certain exceptional properties.” -James Jeans Here on Earth, every living thing is based around four fundamental, elemental building blocks of life: hydrogen, oxygen, nitrogen and, perhaps most importantly, carbon.Image Credit: Robert Johnson / University of Pennsylvania. From diamonds to nanotubes to DNA, carbon is indispensable for constructing practically all of the most intricate structures we know of. Most of the carbon in our world comes from long-dead stars, in the form of Carbon-12: carbon atoms containing six neutrons in their nucleus. About 1.1% of all carbon is Carbon-13, with one...
  • No evidence of time before Big Bang

    12/12/2010 8:51:25 AM PST · by LibWhacker · 46 replies · 1+ views
    Nature ^ | 12/10/10 | Edwin Cartlidge
    Latest research deflates the idea that the Universe cycles for eternity.Our view of the early Universe may be full of mysterious circles — and even triangles — but that doesn't mean we're seeing evidence of events that took place before the Big Bang. So says a trio of papers taking aim at a recent claim that concentric rings of uniform temperature within the cosmic microwave background — the radiation left over from the Big Bang — might, in fact, be the signatures of black holes colliding in a previous cosmic 'aeon' that existed before our Universe.
  • Have we found the universe that existed before the Big Bang?

    11/20/2010 10:05:12 PM PST · by LibWhacker · 136 replies · 1+ views
    io9 ^ | 11/19/10
    Have we found the universe that existed before the Big Bang? The current cosmological consensus is that the universe began 13.7 billion years ago with the Big Bang. But a legendary physicist says he's found the first evidence of an eternal, cyclic cosmos. The Big Bang model holds that everything that now comprises the universe was once concentrated in a single point of near-infinite density. Before this singularity exploded and the universe began, there was absolutely nothing - indeed, it's not clear whether one can even use the term "before" in reference to a pre-Big-Bang cosmos, as time itself may...
  • Cosmic 'Ghost': "Evidence of a supermassive black hole equal in power to a billion supernovas."

    09/04/2010 6:12:52 PM PDT · by LibWhacker · 54 replies
    Mg20727753.800-1_300 NASA's Chandra X-ray Observatory located a cosmic "ghost" that scientists think is evidence of a huge eruption produced by a supermassive black hole equal in power to a billion supernovas. The source, HDF 130, is over 10 billion light years away and existed at a time 3 billion years after the Big Bang, when galaxies and black holes were forming at a high rate. The X-ray ghost, so-called because a diffuse X-ray source has remained after other radiation from the outburst has died away, is in the Chandra Deep Field-North, one of the deepest X-ray images ever taken. "We'd...
  • New cosmic mystery: Herschel telescope spots giant hole in space

    05/11/2010 7:05:39 PM PDT · by NormsRevenge · 35 replies · 1,203+ views
    A vast hole in space has been unexpectedly discovered in a part of the universe thought to be packed with a cloud of dense gas and dust – the latest in a string of cosmic finds by the European Herschel infrared space telescope. The surprising hole in space has provided astronomers with a new glimpse at the end of the star-forming process. ... Stars are born in dense clouds of dust and gas, and while jets of gas have been spotted coming from young stars, the process of how a star uses this gas to disperse surrounding debris and emerge...
  • Origin of key cosmic explosions unraveled

    02/18/2010 2:50:35 PM PST · by NormsRevenge · 10 replies · 427+ views
    AFP on Yahoo ^ | 2/18/10 | AFP
    CHICAGO (AFP) – Astronomers who have long used supernovas as cosmic mile markers to help measure the expansion of the universe now have an answer to the nagging question of what sparks the massive stellar explosions. "These are such critical objects in understanding the universe," lead author Marat Gilfanov of the Max Planck Institute for Astrophysics in Germany said Wednesday in describing his team's study. "It was a major embarrassment that we did not know how they worked. Now we are beginning to understand what lights the fuse of these explosions." Most scientists say Type 1a supernovae are formed when...

    09/20/2009 4:29:11 AM PDT · by Cvengr · 4 replies · 340+ views
    Bible Study Notes | 1989 | R. B. Thieme, Jr.
    C. Gate #3: Self-Righteousness Arrogance. 1. Introduction. a. Self-righteousness means to be righteous in one's own esteem; in fact, to be Pharisaical. Our Lord condemned self-righteousness in His great dissertation of Matt 23, which begins: "Woe unto you, scribes, Pharisees, hypocrites." b. Self-righteousness is generally associated with arrogance. It is the arrogant reliance on one's own assumed, inconsistent, and hypocritical righteousness. c. Self-righteousness is the arrogant conviction that one's own righteousness is superior to that of all others. It is the conclusion that one's own righteousness is so great that intolerance of all others becomes the modus operandi of blind...

    09/20/2009 3:35:25 AM PDT · by Cvengr · 5 replies · 694+ views
    Bible Study Notes | 1989 | R. B. Thieme, Jr.
    A. Gate #1: Motivational Arrogance. 1. Definition and Description. a. All arrogance starts with thinking, moves into motivation, and from there moves into decisions and actions. b. By definition, motivational arrogance is a complex of mental attitude sins, all of which are related to arrogance or have their foundation in the basic concept of the sin of pride. c. Pride is defined as inordinate self-esteem, unreasonable conceit, preoccupation with self, insolence, rejection of authority, vanity, self-justification, an inflated concept of self, and the exaggeration of one's own self-importance. d. The complex of sins in motivational arrogance includes pride, jealousy, bitterness,...
  • Journeying Through the Quantum Froth

    08/09/2009 12:08:19 PM PDT · by LibWhacker · 34 replies · 1,151+ views
    FQXi ^ | 8/9/09 | Marc Kaufman & Zeeya Merali
    Are cosmic rays revealing the quantum nature of spacetime? Could theories of (not) everything help solve the puzzle of quantum gravity? The architect of doubly special relativity thinks so.In his youth, there were two things that regularly competed for Giovanni Amelino-Camelia’s attention: his favorite soccer team, Napoli, and "anything that came close to being scientific." And since Napoli was struggling in the Italian soccer league in the summer of 1978, Amelino-Camelia found himself watching a series of programs on special relativity instead of soccer. "That was really the point of no return for me," he remembers. "Although I was 13-years...
  • Sun leaves Earth wide open to cosmic rays

    06/28/2009 4:33:41 PM PDT · by LibWhacker · 13 replies · 812+ views
    Phenomenica ^ | 6/28/09
    Washington, June 28: The sun, a star at the centre of the solar system, is known to provide ideal conditions for life to thrive on Earth. But, astronomers have claimed that it also leaves the planet wide open to harmful cosmic rays. A joint team from University of Arizona and University of Texas in the US has found that the sun periodically leaves Earth open to assaults from interstellar nasties in a way that most stars do not. The sun protects humans from cosmic rays and dust from beyond the solar system by enveloping in the heliosphere -- a bubble...
  • Is a Nearby Object in Space Beaming Cosmic Rays at Earth?

    05/04/2009 1:58:51 PM PDT · by LibWhacker · 16 replies · 962+ views
    Universe Today | NASA ^ | 5/4/09 | Nancy Atkinson
    Data from several different space and ground based observatories imply the presence of a nearby object that is beaming cosmic rays our way. Scientists with the Fermi Space Telescope say an unknown pulsar may be close by, sending electrons and positrons towards Earth. Or another more exotic explanation is that the particles could come from the annihilation of dark matter. But whatever it is, the source is relatively close, surely in our galaxy. “If these particles were emitted far away, they’d have lost a lot of their energy by the time they reached us,” said Luca Baldini, a Fermi collaborator....
  • New Mystery from Cosmic Dawn: The Blob

    04/22/2009 4:33:54 PM PDT · by LibWhacker · 7 replies · 612+ views
    Universe Today ^ | April 22nd, 2009 | Anne Minard
    This image of the Himiko object is a composite and in false color. The bar at the lower right represents 10,000 light years. Credit: M. Ouchi et al. This mysterious, giant object existed at a time when the universe was only about 800 million years old. It stretches for 55 thousand light years, a record for that early point in time. Its length is comparable to the radius of the Milky Way’s disk. Besides being a great candidate for a future “Where in the Universe Challenge,” what is it? In general, objects such as this one are dubbed extended...
  • Hubble Photographs Cosmic Fountain

    04/21/2009 9:21:30 AM PDT · by NormsRevenge · 21 replies · 1,422+ views ^ | 4/21/09
    To commemorate almost two decades of photographing the wonders of the universe, the Hubble Space Telescope captured an image of a peculiar group of interacting galaxies that contains a "cosmic fountain" of stars, gas and dust that stretches about 100,000 light years. Over the past 19 years, Hubble has taken many images of galactic collisions and close encounters. The new image of a trio of galaxies, called Arp 194, looks as if of the galaxies has sprung a leak. The bright blue streamer seen in the image is really a stretched spiral arm full of newborn blue stars. This stellar...