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    black hole tagged posts

    A surprisingly Big Black Hole might have Swallowed a Star from the Inside Out, and scientists are baffled

    December 2, 2019, Categories  Astronomy/Space

    A recently discovered black hole – found by the way it makes a nearby star wobble – is hard to square with our understanding of how these dark cosmic objects form. Credit: NAOC, Chinese Academy of Sciences

    About 15,000 light years away, in a distant spiral arm of the Milky Way, there is a black hole about 70 times as heavy as the Sun. The black hole seems too big to be the product of a single star collapsing, which poses questions for our theories of how black holes form.

    Our team, led by Professor Jifeng Liu at the National Astronomical Observatories, Chinese Academy of Sciences, has dubbed the mysterious object LB-1.

    Astronomers estimate that our galaxy alone contains about 100 million black holes, created when massive stars have collapsed over the past 13 billion years.

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    ALMA dives into Black Hole’s ‘Sphere of Influence’

    August 15, 2019, Categories  Astronomy/Space

    Telescope (NASA/ESA); Carnegie-Irvine Galaxy Survey

    ALMA has made the most precise measurements of cold gas swirling around a supermassive black hole – the cosmic behemoth at the center of the giant elliptical galaxy NGC 3258. What happens inside a black hole stays inside a black hole, but what happens inside a black hole’s “sphere of influence” – the innermost region of a galaxy where a black hole’s gravity is the dominant force – is of intense interest to astronomers and can help determine the mass of a black hole as well as its impact on its galactic neighborhood.

    Millimeter/submillimeter Array (ALMA) provide an unprecedented close-up view of a swirling disk of cold interstellar gas rotating around a supermassive black hole...

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    Hubble uncovers Black hole that Shouldn’t Exist

    July 13, 2019, Categories  Uncategorized

    NGC 3147 (left) and artist impression of black hole
    A Hubble Space Telescope image of the spiral galaxy NGC 3147 appears next to an artist’s illustration of the supermassive black hole residing at the galaxy’s core. The Hubble image shows off the galaxy’s sweeping spiral arms, full of young blue stars, pinkish nebulas, and dust in silhouette. However, at the brilliant core of NGC 3147 lurks a monster black hole, weighing about 250 million times the mass of our Sun. Hubble observations of the black hole demonstrate two of Einstein’s theories of relativity. The reddish-yellow features swirling around the center are the glow of light from gas trapped by the hefty black hole’s powerful gravity. The black hole is embedded deep within its gravitational field, shown by the green grid that illustrates warped space...
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    Enduring ‘Radio Rebound’ powered by Jets from Gamma-Ray Burst

    July 29, 2018, Categories  Astronomy/Space

    Artist impression of the "reverse shock" echoing back though the jets of the gamma-ray burst (GRB 161219B). Credit: NRAO/AUI/NSF, S. Dagnello

    Artist impression of the “reverse shock” echoing back though the jets of the gamma-ray burst (GRB 161219B).
    Credit: NRAO/AUI/NSF, S. Dagnello

    ALMA creates its first-ever movie of cosmic explosion. In the blink of an eye, a massive star more than 2 billion light-years away lost a million-year-long fight against gravity and collapsed, triggering a supernova and forming a black hole at its center. This newborn black hole belched a fleeting yet astonishingly intense flash of gamma rays known as a gamma-ray burst (GRB) toward Earth, where it was detected by NASA’s Neil Gehrels Swift Observatory on 19 December 2016.

    While the gamma rays from the burst disappeared from view a scant seven seconds later, longer wavelengths of light from the explosion – including X-ray, visible light, and radio – con...

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