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Thread: Star formation in intergalactic space?

  1. #1
    Join Date
    Jan 2004
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    Star formation in intergalactic space?

    Probably a silly question, but do we only ever observe star formation within galaxies or have we ever observed star formation between galaxies in intergalactic space?

    If not, do we consider intergalactic space to be the equivalent of a desert with only the occasional ejected hyper-velocity stars or rogue planets?

    I have seen on that TV series "How the Universe Works" that they have seen a black hole between the galaxies, or was a black hole in a dwarf galaxy?

    The nearest that show got to covering this was their programme on the interstellar medium.

    I watch it on Discovery Science.

  2. #2
    Join Date
    Jul 2005
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    Massachusetts, USA
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    Quote Originally Posted by Sticks View Post
    ... I have seen on that TV series "How the Universe Works" that they have seen a black hole between the galaxies, or was a black hole in a dwarf galaxy? ...
    I believe that the galaxy-less SMBH mentioned in HTUW was said to probably be an ejected black hole from a three way galaxy merger.

    As to the first of your questions about star formation in intergalactic space, it has been observed in the streamers of gas ejected from galaxies during gravitational interactions, such as what happened to the LMC & SMC as they passed the Milky Way, but as to out in deep space between galaxies, it is possible in my estimation, but to my knowledge hasn't been observed, that if there is a fortunately aligned merger of two large gas clouds that the necessary environment for creating stellar nurseries and a brand new blue low density galaxy should occur.
    Forming opinions as we speak

  3. #3
    Join Date
    Sep 2004
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    This thread got me to looking for mention of the rogue black hole. couldn't find it, but did find this search for them. When was the rogue black hole found?

    https://astronomynow.com/2016/07/04/...c-black-holes/

    Found this on intergalactic stars, which was fascinating.

    https://en.wikipedia.org/wiki/Intergalactic_star


    LATER: Wait, was this the rogue black hole?

    https://www.nasa.gov/feature/goddard...-galactic-core
    Do good work. —Virgil Ivan "Gus" Grissom

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