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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?