reply to post by zorgon
OK, this has taken off, while I took some breaks off.....I haven't digested the full OP yet, so sorry if this is made clear (or not) there:
This theory about OUR Sun possibly having accreted and evolved whilst part of a lesser galaxy, that later merged with the larger "milky way" that
happened to be nearby....I HOPE that the impression hasn't been left in people's minds that this occurred sometime during the existence of HUMANS on
this Earth....did it?
In other words, was it made quite clear that any such event would have happened hundreds of millions, to billions of years ago....maybe even before
there was anything other than single-celled, or very basic multi-cellular lifeforms on this planet?
I'm comparing to the trending theory, of the possibility of future
"mergings" in store for this Galaxy,and Andromeda....in about,
Billion years hence......just to put a timescale perspective on it.
So that people can (hopefully) remember to think outside the Human lifespan paradigm, and try to wrap their minds around the incredible
timescales involved, instead......
Also, this statement jumped out at me, could you clarify (to see if I am interpreting you correctly)?:
Scientists have always wondered why the Milky Way is at an angle to us... until now.
What "angle" do you mean? Reason to ask is, it appears, by this sentence, that you are under the impression that our Solar System's plane of orbital
be roughly parallel to the overall Galactic arrangement, and "plane", based on bisecting it through an imaginary and
theoretical 'middle", with an equally theoretical central "axis" at a ninety-degree angle, to that plane.
Am I to infer this is your assertion? That, because our Solar System's plane is angled to that of the "Greater Galactic Plane" ( I just coined
), that is evidence of our "foreignness"? Because, for that to remain a valid assumption, would require that ALL Milky Way "native"
planetary systems are all 'parallel' to the "GGP".
I would like to point out something I mentioned in another thread, when referring to this one --- astronomers are finding some extra-solar planets by
observing the effects they have on their host stars....a detectable "wobble"...but, this can only be seen when the orbital plane of this other star
system is "edge on" from our point-of-view. I mistakenly said "parallel" in the other thread, which isn't entirely correct....it could be rotated
around a full 360-degree compass, it is the "edge on" quality that distinguishes it, for that sort of observation techniques.
It just seems logical, to me, that since there really is no "up" or "down" in space (they are arbitrary constructs, for our convenience, especially
when mapping), that orbits of any star system can be oriented in virtually infinite ways....an axis of rotation that can be imagined to trace out a
spherical shape, as you re-position it (in a mind experiment, to aid in visualization).....Hope this makes sense.
edit on 10 December 2010 by weedwhacker because: (no reason given)