Galaxies are merging.

Discussion in 'Entertainment' started by Jaeger, Apr 11, 2006.

  1. Jaeger

    Jaeger Guest

    Freaky deaky. Kinda hard for me to wrap my head around that. Will stars collide?

    Astronomers find black holes spiralling together

    Last Updated Thu, 06 Apr 2006 13:14:54 EDT

    Astronomers have found a pair of giant black holes that are moving together and could eventually merge into a single super-massive black hole.

    Scientists had already observed the two black holes using radio telescopes, but new data from NASA's Chandra X-ray Observatory show how the two are bound by gravity and orbiting each other.

    The X-ray data show that the two black holes are moving at about 1200 kilometres per second. As they move through interstellar gas, they emit jets of plasma that are bent back behind them.

    Craig Sarazin, an astronomer at the University of Virginia, compares the jets to contrails produced by airplanes. By observing radiation from the jets, the researchers found that they are bent together and intertwined, showing that the two blacks holes are orbiting each other.

    Sarazin, Daniel Hudson and Thomas Reiprich of the University of Bonn, and Tracy Clarke of the U.S. Naval Researcher Laboratory co-authored the study, which was published in Thursday's issue of the journal Astronomy & Astrophysics.

    A black hole is a concentration of mass so great that not even light can escape its gravitational pull. They are formed when a star collapses under its own mass. Super-massive black holes are believed to exist at the centres of most galaxies.

    Astronomers have theorized that coupled black holes exist, and that they can merge into even larger black holes. The new observations give more evidence that this actually happens.

    Each of the two black holes is at the centre of its host galaxy and those galaxies are merging. As well, the galaxy cluster where the two galaxies are found, Abell 400, is merging with a neighbouring cluster.
  2. galek_spoo

    galek_spoo Active Member

    Apr 13, 2004
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    Del Valle, TX
    thats an interesting find.

    did you actually post freaky deaky? i haven't heard anyone use that since elementary school.
  3. Ramataklan

    Ramataklan Active Member

    Feb 11, 2006
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    why is it impossible to be faster than light?
  4. fantyx

    fantyx New Member

    Apr 10, 2006
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    According to the (theory of reletivity?) the thrust needed to propel a craft increases exponentially as you approach the speed of light. Of course no one has reached even close to a sizable fraction of this so it hasn't been tested. There was a whole list of reasons why one cannot go faster then light, but they are all based on what we've seen.
    So in the future all these ideas may just be blown away. After all it was origionally thought that a jet would explode as it passed the sound barrier.
  5. Neil@Libra

    [email protected] New Member

    May 15, 2006
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    If memory serves, I believe our own neighboring Andromeda Galaxy has a merge date with our Milky Way Galaxy in a few billion years. Nothing to be concerned about, happens all the time. Here's a pic of such a collision from the Hubble telescope:
    Last edited: Jul 15, 2006
  6. Joe_Cool

    Joe_Cool Moderator

    Jun 30, 2003
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    It's not because of mass increasing or anything like that. It's because of a quirk of space/time. Time and Space are both affected by travel at high relative velocity.

    It may be possible to exceed light speed, but the reason we believe it's not is that relativity has proven to be correct, both mathematically and experimentally. And in relativity, when v = c you get some weird mathematical problems like infinities and dividing by zero.

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