Keyword: cosmology

Brevity: Headers | « Text »
  • The universe is expanding. but astrophysicists aren't sure how fast

    08/08/2018 11:39:48 AM PDT · by ETL · 49 replies
    LiveScience.com ^ | Aug 7, 2018 | Thomas Kitching, UCL
    Next time you eat a blueberry (or chocolate chip) muffin consider what happened to the blueberries in the batter as it was baked. The blueberries started off all squished together, but as the muffin expanded they started to move away from each other. If you could sit on one blueberry you would see all the others moving away from you, but the same would be true for any blueberry you chose. In this sense galaxies are a lot like blueberries. Since the Big Bang, the universe has been expanding. The strange fact is that there is no single place from...
  • Could aliens harness stars to keep ahead of expanding universe?

    06/20/2018 8:29:23 AM PDT · by Red Badger · 70 replies
    phys.org ^ | June 20, 2018 | by Bob Yirka
    Credit: CC0 Public Domain _____________________________________________________________________________ Dan Hooper, a senior scientist with Fermi National Accelerator Laboratory has written a paper outlining a way future aliens could keep their civilizations alive in spite of the isolation due to an expanding universe. In his paper uploaded to the arXiv preprint server, he suggests they might consider collecting and storing stars. A Dyson sphere is a theoretical structure able to house a star. Originally proposed by Freeman Dyson, the sphere was originally envisioned as a group of satellites completely encompassing a star to capture all of its energy. That energy could then be...
  • Big Bang, Big Claim: Why This Bold Idea Is Right

    04/24/2018 10:57:04 AM PDT · by ETL · 89 replies
    Space.com ^ | Apr 21, 2018 | Paul Sutter, Astrophysicis | LiveScience
    At 13.8 billion years ago, our entire observable universe was the size of a peach and had a temperature of over a trillion degrees. That's a pretty simple, but very bold statement to make, and it's not a statement that's made lightly or easily. Indeed, even a hundred years ago, it would've sounded downright preposterous, but here we are, saying it like it's no big deal. But as with anything in science, simple statements like this are built from mountains of multiple independent lines of evidence that all point toward the same conclusion — in this case, the Big Bang,...
  • How do you prove that Earth is older than 10,000 years?

    12/02/2017 12:19:56 PM PST · by SeekAndFind · 73 replies
    Backreaction ^ | Sabine Hossenfelder
    Planet Earth formed around 4.5 billion years ago. The first primitive forms of life appeared about 4 billion years ago. Natural selection did the rest, giving rise to species increasingly better adapted to their environment. Evidence, as they say, is overwhelming. Or is it? Imagine planet Earth began its existence a mere 10,000 years ago, with all fossil records in place and carbon-14 well into decaying. From there on, however, evolution proceeded as scientists tell us. How’d you prove this story wrong? You can’t. I know it hurts. But hang on there, band aid follows below. You can’t prove this...
  • Does Dark Energy Exist?

    07/01/2017 7:01:15 PM PDT · by ETL · 55 replies
    Space.com ^ | June 28, 2017 | Paul Sutter, Astrophysicist
    Newsflash: the universe is expanding. We've known that since the pioneering and tireless work of Edwin Hubble about a century ago, and it's kind of a big deal. But before I talk about dark energy and why that's an even bigger deal, I need to clarify what we mean by the word "expanding." The actual observation that you can do in the comfort of your own home (provided you have access to a sufficiently large telescope and a spectrograph) is that galaxies appear to be receding from our own Milky Way. On average, of course: galaxies aren't simple creatures, and...
  • Atheist cosmologist warns “deeply religious” people not to put their faith in “apparent” fine-tuning

    02/25/2017 6:54:04 AM PST · by SeekAndFind · 36 replies
    Uncommon Descent ^ | 02/24/2017
    In “Physics: A cosmos in the lab,” a review of A Big Bang in a Little Room: The Quest to Create New Universes by Zeeya Merali, cosmologist Andreas Albrecht writes at Nature, The question of cosmic origins, and the possibility that humans might create new universes, can connect with religious concerns. These form a substantial thread through A Big Bang in a Little Room that significantly reduced the book’s appeal to me. I am an atheist. I respect that many people are deeply religious (some are very close to me) and that religion can have a positive, even beautiful,...
  • The Most Persuasive Scientific Reason to Believe?

    What scientific argument for the truth of Christianity do you find the most persuasive? As I contemplated this question, my answer was big bang cosmology. Here’s why. All big bang models include three essential features: (1) constant laws of physics throughout the universe; (2) a dynamic universe, one either expanding or contracting; and (3) a beginning to the universe. Remarkably, the biblical description matches these essential features. Constant Laws of Physics The scientific enterprise depends on a universe governed by constant laws of physics. If measurements today have no bearing on what happened yesterday or will happen tomorrow, no scientific...
  • A couple of answers for Betsy DeVoss

    01/18/2017 5:47:04 PM PST · by ganeemead · 21 replies
    Betsy DeVoss will be harassed by two questions involving religion and the supposed conflict between religion and science: Question 1: Are you some sort of a knuckle-dragging, illegal alcohol drinking, hick rube who doesn´t believe in evolution? and Question 2: Are you some sort of a knuckle-dragging, illegal alcohol drinking, hick rube who does not believe that our Earth is four billion years old? The following are the two best answers to all of that which I´ve come across; somebody would be doing Ms. DeVoss a favor if they could get this to her. The answer to question 1:: A...
  • 5th force of nature possibly discovered, US physicists say

    08/16/2016 5:45:02 AM PDT · by Bloody Sam Roberts · 68 replies
    RT America ^ | Unknown
    Scientists are ecstatic over the fact that they may have just discovered the fifth fundamental force of nature. The possible discovery of a previously-unknown subatomic particle looks set to finally bring the elusive dark matter into the mix. The discovery centers on a new type of boson that possesses characteristics previously unseen in particles. Furthermore, its existence casts doubt upon whether the known ‘sector’ of matter and particles exists alongside a ‘dark’ sector – both interacting with each other via another, unseen force.“If true, it's revolutionary,” said Jonathan Feng, professor of physics & astronomy at the University of California, Irvine,...
  • Ancient Greek 'computer' came with a user guide

    07/02/2016 1:00:20 AM PDT · by blueplum · 63 replies
    Fox News ^ | 28 June 2016 | Megan Gannon
    ....With the turn of a hand crank, the ancient Greeks could track the positions of the sun and the moon, the lunar phases, and even cycles of Greek athletic competitions. The 82 corroded metal fragments of the Antikythera mechanism contain ancient Greek text, much of which is unreadable to the naked eye. But over the past 10 years, new imaging techniques, such as 3D X-ray scanning, have revealed hidden letters and words in the text...
  • The Universe Had a Beginning [Video & Transcript]

    04/06/2016 6:31:24 PM PDT · by SoFloFreeper · 30 replies
    Ligonier ^ | 4/5/16 | Nathan Bingham
    In this excerpt from his message at our 2012 National Conference, Dr. Stephen Meyer tells the story of how Hubble showed Einstein that the universe was not eternal but must have had a beginning.-vid at link
  • Proof that God Exist

    12/21/2015 11:34:37 PM PST · by Fai Mao · 17 replies
    House of Eratosthenes ^ | 12/20/2015 | Morgan Freeberg
    It’s an interesting summation of the argument. One might accuse Tipler of transmogrifying the dispute away from “Is there a God?” to “Is there a causative agent existing outside of space and time?” But if you’ve ever watched people wrestle with these accusations that the faithful are the ones displaying incompetence, you know that this is exactly what’s being debated. It’s chicken-and-egg, with “things that exist in space and time” being the egg.
  • Galactic Monster Mystery Revealed in Ancient Universe [Galaxies that shouldn't exist!]

    11/19/2015 12:26:11 PM PST · by Red Badger · 34 replies
    Discovery.com ^ | Nov 19, 2015 07:00 AM ET | by Ian O'Neill Source: ESO
    ESO's VISTA survey telescope has spied a horde of previously hidden massive galaxies that existed when the Universe was in its infancy. By discovering and studying more of these galaxies than ever before, astronomers have for the first time found out exactly when such monster galaxies first appeared. The newly discovered massive galaxies are marked on this image of the UltraVISTA field. [RED CIRCLES] ================================================================================================================ Astronomers have detected something baffling at the furthest frontiers of our observable universe: massive galaxies -- lots of massive galaxies -- that shouldn't even exist. Depending on the wavelength you observe the universe in,...
  • 22 Articles:Commentaries:Hawking's Aliens.The Search for Intelligent ET Life

    09/24/2015 10:14:39 AM PDT · by lbryce · 43 replies
    Cosmology.com ^ | August, 2015 | Various
    22 Articles on Whether Or Not To Search for Extraterrestrial Life. Full Title:Commentaries: Stephen Hawking's Aliens. The Search for Intelligent Extraterrestrial Life. Project Breakthrough Listen Abstract Stephen Hawking and Yuri Milner have launched a $100m search for intelligent alien life beyond solar system; a program focused on listening for radio signals coming from advanced civilizations far beyond the solar system, which, presumably, rely on similar technologies as those of the present civilizations of Earth. The search will be 50 times more sensitive, and cover 10 times more sky, than previous hunts for alien life. According to Stephen Hawking the effort...
  • Are We Living In A Black Hole?

    09/05/2015 2:41:01 PM PDT · by LibWhacker · 39 replies
    One Universe at a Time ^ | 9/4/15 | Brian Koberlein
    Are We Living In A Black Hole? // / Here’s an idea, what if the universe and everything we see around us is actually inside a black hole?Whenever I’m asked this question, what folks typically have in mind is that the universe began as an infinitely dense point, just like the singularity of a black hole, and because of cosmic expansion there’s a limit to how far we can observe, so maybe that’s like the event horizon. While it’s an interesting idea, things aren’t quite so simple.To begin with, the universe did not begin with an explosion from a...
  • Life on Europa?

    03/16/2015 3:14:41 PM PDT · by JimSEA · 40 replies
    Geology.com ^ | 3/16/2015 | Staff
    For the past several centuries everyone believed that Mars was the most likely body in our solar system to support life beyond Earth. But, after centuries of telescope observation, decades of spacecraft exploration and several robots exploring its surface the promise of discovering life on Mars remains elusive. Now, scientific attention is being focused on Europa, the fourth largest of Jupiter's 67 confirmed moons. It may be an even better candidate for finding life than Mars. For life to be present the three basic requirements are: 1) liquid water; 2) chemical building blocks; and, 3) a source of energy. Europa...
  • Einstein put to the test: Satellite mission on dark energy and theory of gravitation

    03/06/2015 2:12:49 AM PST · by samtheman · 16 replies
    http://www.sciencedaily.com/ ^ | March 5, 2015 | Heidelberg University
    Physicists have gained new insights into dark energy and the theory of gravitation by analyzing data from the "Planck" satellite mission of the European Space Agency (ESA). Their results demonstrate that the standard model of cosmology remains an excellent description of the universe. Yet when the Planck data is combined with other astronomical observations, several deviations emerge. Further studies must determine whether these anomalies are due to measurement uncertainties or undiscovered physical correlations, which would also challenge Einstein's theory of gravitation. Thus, the analysis of the Planck data gives major impetus for research during future space missions.
  • The Paradoxes That Threaten To Tear Modern Cosmology Apart

    01/20/2015 4:43:30 PM PST · by LibWhacker · 99 replies
    Medium ^ | 1/20/15
    Some simple observations about the universe seem to contradict basic physics. Solving these paradoxes could change the way we think about the cosmos Revolutions in science often come from the study of seemingly unresolvable paradoxes. An intense focus on these paradoxes, and their eventual resolution, is a process that has leads to many important breakthroughs. So an interesting exercise is to list the paradoxes associated with current ideas in science. It’s just possible that these paradoxes will lead to the next generation of ideas about the universe. Today, Yurij Baryshev at St Petersburg State University in Russia does just this...
  • Astronomers confirm contamination by stardust in detection of sky ripples

    09/28/2014 10:47:34 PM PDT · by smokingfrog · 10 replies
    The Tech ^ | 9-26-14 | Dennis Overbye
    Stardust got in their eyes. In the spring a group of astronomers who go by the name of BICEP announced they had detected ripples in the sky, gravitational waves that were the opening notes of the Big Bang. The finding was heralded as potentially the greatest discovery of the admittedly young century, but some outside astronomers said the group had underestimated the extent to which interstellar dust could have contaminated the results - a possibility that the group conceded in its official report in June. Now a long-awaited report by astronomers using data from the European Space Agency’s Planck satellite...
  • For the First Time, We Have a Detailed Model of the Universe

    05/11/2014 12:12:47 PM PDT · by lbryce · 100 replies
    Atlantic ^ | May 8 2014, | Megan Garber
    It is, if you except the powers of human memory, the closest thing we have to a time machine. Scientists have created the first realistic model of the universe, capable of recreating 13 billion years of cosmic evolution. The simulation is called “Illustris,” and it renders the universe as a cube (350 million light-years on each side) with, its creators say, unprecedented resolution: The virtual universe uses 12 billion 3-D “pixels,” or resolution elements, to create its rendering. And that rendering includes both normal matter and dark matter. The rendering, importantly, also includes elliptical and spiral galaxies—bodies that, because of...