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  #1  
Old 2001-04-04, 08:54
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or..maybe..There is a slight possiblity we live in a binary system, its just much wider then Twinsuns.
see:
http://www.space.com/scienceastronom...is_010320.html
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Old 2001-04-04, 20:54
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Hmmm this sounds interresting

I haven't read it all and I don't understand everything of it but I think I know what they mean
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Old 2001-04-04, 22:16
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I personally don't believe it. They could easily pick up the motion of this star while it is orbiting the Sun if it is only upto 3 light years away. They have mapped numerous stars motion and none have appeared to move in relation to our sun (in an orbit).Besides, one moving that close would show up very quickly.

Another thing is that if there was a second star oribiting our sun then it wouldn't be a binary star system because a Red Dwarf 3 light years away is hardly going to have any gravitational effect on our Sun at all. Lastly there is a certain distance for each mass of object where it's gravitational field becomes too weak to cause an object to take on an orbit. I am sure that 1 or 3 light years is too far for our Sun to snare an object into an orbit.
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Old 2001-04-04, 22:48
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indeed sounds interesting. space always atracted me. anyway, i agree with phoenix especially in his last point. but on the other hand, who knows? maybe we'll know for sure in a... few () years.
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Old 2001-04-04, 23:45
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Its highly unlikely, but it possible for binarys to have wide orbits.
The unlikely thing is the orbits crossing over.
As for not decting it, in order to measure how far away a star is, a precise position of it has to be take now, and 6 monthes latter.By comparing postions (and a simple bit of Trig) the distance can be calualted.
Red Shift can not used to postioned a star like this.
The shear volume of stars, we have only measure a tiny percentage.And if its a 'darkish' star like a brown dwalf it would be almost impossible to detect directly.
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The unconvving thing I thought about the artical was the graph.The was a distint lack off extintion during of of the 26m year periods.
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