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Duplicate galaxies in the Hubble Ultra Deep Field Photo?
Last post 07-01-2009 07:08 AM by chipdatajeffB. 1 replies.
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  • 06-30-2009 08:05 PM

    • tomg
    • Joined on 07-01-2009
    • Posts 1

    Duplicate galaxies in the Hubble Ultra Deep Field Photo?

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    First, let me say that I am, astronomically speaking, well, ignorant.  If you wish to interpret that as I am astronomically ignorant,  so be it. It’s probably not far from the truth.  I say this because what I am about to ask, may well fit into that (ignorant) category. But since I don't know the answer, I was hoping someone could spare the time to enlighten me.  Recently, I was staring into the Hubble ultra deep field photograph and noticed something interesting.  Namely twin galaxies, or what appears to be the same galaxy in two places.  I was wondering if this is an example of gravitational lensing?  I would attach a picture of their locations if I could figure how to insert a bitmap file in here.  But, failing that, I'll try to describe the location of the point 1/2 way between the two galaxies (I keep calling them galaxies; they appear to be spirals seen edgewise, but they could be anything).  Given that the HUDF photo is square and 100 units on each side, the point ½ way between the objects is 24.5 units down from the upper left corner of the photo, and 43.3 units to the right from the upper left corner.  The objects are separated by approximately 16.3 units. They both lie on a line almost exactly parallel with the horizontal edge of the photo.

    Possibly I am the only one on earth who does not know that this was noticed years ago when the photo was first released, or I got hold of a copy of the HUDF that had been photo shopped for a joke (funny!).  Anyway, what gives here?

  • 07-01-2009 07:08 AM In reply to

    Re: Duplicate galaxies in the Hubble Ultra Deep Field Photo?

    I see what appear to be two very similar edge-on galaxies centered on that location, but they are quite far apart and are slanted at almost exactly the same angle, rather than being "mirrored" so I don' think they are lensed.

    Here is the image.

    Signature
    The universe is not only stranger than we imagine, it's stranger than we CAN imagine. --- JBS Haldane
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