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  • richardmitnick 3:10 pm on March 3, 2017 Permalink | Reply
    Tags: , , , , , Halos touching?, Science Vibe, Who cares? Pay your taxes.   

    From Science Vibe: “ASTRONOMERS FEAR Milky Way on COLLISION PATH with ANDROMEDA” 

    [OF COURSE IT IS, WE ALL KNOW THAT ALREADY. BUT, NOT NOW, SO PAY YOUR TAXES.]

    Science Vibe bloc

    SCIENCE VIBE

    March 2, 2017
    No writer credit

    1
    No image caption. No image credit.

    Though the merger of the Milky Way and Andromeda galaxy isn’t expected to happen for another 4 billion years, the recent discovery of a massive halo of hot, ionized gas around Andromeda may mean our galaxies are already touching. Using the Hubble Space Telescope, astrophysicist Nicholas Lehner and a team of scientists were able to identify halo at least 2 million light-years in diameter surrounding the galaxy.

    The Andromeda Galaxy is the largest in a collection of about 54 galaxies in the Local Group, which includes the Milky Way.

    Local Group. Andrew Z. Colvin 3 March 2011
    Local Group. Andrew Z. Colvin 3 March 2011

    With twice as many stars as the Milky Way, it shines 25% brighter and can be seen with the naked eye from rural skies. If the halo extends a million light years in our direction, our two galaxies are much closer to touching than previously thought. We may even be mingling molecules.

    Lehner describes the halos as the “gaseous atmospheres of galaxies.” To find and study the nearly-invisible halo, the team sought out quasars. The brightest quasar, 3C273 in Virgo, can be seen in a 6-inch telescope. Their pinpoint nature makes them the perfect probes for the job.

    “As the light from the quasars travels toward Hubble, the halo’s gas will absorb some of that light and make the quasar appear a little darker in just a very small wavelength range,” J. Christopher Howk, an associate professor of physics at Notre Dame, told reporters. “By measuring the dip in brightness, we can tell how much halo gas from M31 there is between us and that quasar.”

    Astronomers have observed halos around 44 other galaxies, but never one as massive as Andromeda, where so many quasars are available to clearly define its extent. The previous 44 were all extremely distant galaxies, with only a single quasar to determine halo size and structure.

    The halo is estimated to contain half the mass of the stars in the Andromeda galaxy itself, in the form of hot diffuse gas. Although it is mostly composed of ionized hydrogen, Andromeda’s aura is rich in heavier elements that likely come from supernovae. They erupt within the galaxy and blow iron, silicon, oxygen and other elements into space. Nearly half of all the heavy elements made by Andromeda’s stars have been expelled beyond the galaxy’s 200,000-light-year-diameter stellar disk.

    See the full article here .

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  • richardmitnick 11:41 am on September 17, 2016 Permalink | Reply
    Tags: , Science Vibe, ,   

    From Science Vibe: “Yellowstone Sits On Restless Volatile Supervolcano! The World’s Biggest? [ includes video]” 

    Science Vibe bloc

    SCIENCE VIBE

    February 16, 2016
    No writer credit

    1
    http://io9.gizmodo.com/what-will-really-happen-when-yellowstone-volcano-has-a-508274690

    There is a giant Supervolcano sitting underneath Yellowstone and scientists say it will erupt again and that the only real question is “when”, and not “if”. There are three things that indicate an imminent volcano eruption: 1) earthquakes, 2) land deformation, and 3) changes in thermal activity like an increase in geyser activity and higher water temperatures. Scientist say that all three indicators are present at Yellowstone.

    The Yellowstone Plateau is a ‘geomorphic landform’ and the is no question that one day the restless giant will awakened and erupt into a massive explosion. Magma which is molten rock from the Earth’s mantle has been near the surface for almost 2 million years making extremely volatile. The resurgent domes inside the Yellowstone Caldera and magma may be as little as 3–8 miles beneath Sour Creek Dome and 8–12 miles beneath at Mallard Lake Dome. The domes lift and subside when magma activity and hydrothermal fluids swell up or drop down and the frequency indicates just how volatile the this Supervolcano truly is.

    When the first massive volcanic eruption occurred eons ago the volume of material ejected was approximately 6,000 times the size of the 1980 eruption of Mt. St. Helens in Washington. Approximately 1.3 million years ago, a second, smaller volcanic eruption occurred within the western edge and then 640,000 years ago, a third massive volcanic eruption created the Yellowstone Caldera, 30 by 45 miles in size.

    This Supervolcano could become the biggest eruption in history!

    See the full article here .

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  • richardmitnick 6:40 pm on June 21, 2016 Permalink | Reply
    Tags: Astonishing Length Of A Galactic Year | Sun’s Orbit Around Milky Way, , , Science Vibe   

    From Science Vibe: “Astonishing Length Of A Galactic Year | Sun’s Orbit Around Milky Way” 

    Science Vibe bloc

    SCIENCE VIBE

    June 21, 2016
    No writer credit found

    The moon orbits the Earth, the Earth orbits the sun, and the sun orbits the Milky Way and in 1999, Astronomers focused on a star at the center of the Milky Way and measured precisely for the first time how long it takes the sun to complete one orbit (a galactic year) of our home galaxy. The answer 226 million years. That means that when the last galactic orbit was completed, dinosaurs ruled the world. The Solar System is thought to have completed about 20–25 orbits during its lifetime or 0.0008 orbit since the origin of humans since it was formed around 4.5 billion years ago.

    1
    http://www.seasky.org

    Using the Hubble Space Telescope, the astronomers focused on Sagittarius A, a star discovered over two decades ago to mark the Milky Way’s center and plotted the motion of the Milky Way and found that the sun and its family of planets were orbiting the galaxy at about 135 miles per second which means the sun circles the Milky Way at a speed of about 486,000 miles per hour.

    Sag A*  NASA Chandra X-Ray Observatory 23 July 2014, the supermassive black hole at the center of the Milky Way
    Sag A* NASA Chandra X-Ray Observatory 23 July 2014, the supermassive black hole at the center of the Milky Way

    And keep in mind that every object in the universe is moving apart from the other objects as the universe expands at a constantly accelerating rate. Thea astronomer’s measurement supports the idea that the Milky Way’s center contains a supermassive black hole which is about 2.6 million times more massive than the sun.

    The sun is one of about 100 billion stars in the Milky Way, one of billions of ordinary galaxies in the universe.

    Milky Way NASA/JPL-Caltech /ESO R. Hurt
    Milky Way NASA/JPL-Caltech /ESO R. Hurt

    The Milky Way is a spiral galaxy, with curving arms of stars pinwheeling out from a center.The solar system is about halfway out on one of these arms and is about 26,000 light years from the center. A light year is about 6 trillion miles

    See the full article here .

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  • richardmitnick 6:45 am on May 7, 2016 Permalink | Reply
    Tags: "What will the Earth look like in 100 million years?", , , Science Vibe   

    From Science Vibe: “What will the Earth look like in 100 million years?” Really cool video 

    Science Vibe bloc

    SCIENCE VIBE

    June 16, 2015 [Just appeared in social media]

    Our continents have moved and shifted an enormous amount in the last 500 million years…

    …from Gondwanaland to Pangea to our current beautiful distribution. What will happen in an additional 100 years? As they say, the only constant is change, and this applies very much to our tectonic plates. In the grand scale of things modern humans have only been here for a blink of an eye, a mere blip on the timeline. Will anyone human be here to witness the next incarnation of our planet? This beautiful video does not answer that question, but it does give a great view of Earth through the eons.


    Projections: Northern Arizona University

    Watch, enjoy, learn.

    See the full article here .

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