Used Western Saddles

Star Two

Are we a two star system with a burned out twin?

I have wondered this to myself for some time and let me explain why. Neptune's orbit is influenced by another body of some type and this was supposed to be one of the reasons for the discovery of Pluto. The problem is that the mass of Pluto is not great enough to cause this change in Neptune’s (much larger mass) orbit. No planet with a mass great enough has yet to be discovered, not even that so called tenth planet. After reading about how some twin star systems have orbital distances of upwards to half a light years or so, could it not be possible that we have a long dead and smaller twin out there? Maybe a Brown Dwarf or a burned out Neutron star, or a burned out small star that is so far away that we can not see the light, not even with our best telescopes. If I am wrong tell me why and then I am interested in some shared ideas as to what you think is influencing Neptune’s orbit and why we have not discovered this influence?

The reason we thought there was an object waiting out there tugging at Neptune was because we had bad data on the mass of the planet, when the Voyager 2 spacecraft reached Neptune we found out that our estimate was off by half a percent, putting the new value into our calculations (along with a bunch of other new values the Voyagers discovered) and running them resulting in a perfect match of the observations.

So to put things simply, there is nothing strange going on with Neptune's orbit and no reason to assume that there is a large body pulling on it.

Also note that Jupiter is not a star and not even close to being one so we can't claim to be a binary because of that. It might be possible that there is a Brown Dwarf out there but we should have detected it with IR instruments by now given how close it would have to be. A black hole might exist and if it isn't sucking in material would be almost completely invisible (and there really isn't much for one to suck in nor would we be in any danger), a neutron star or white dwarf I would expect us to be able to see if it were out there and if it formed in recent times we wouldn't exactly be here to ask about it.

Star Craft 2 - Gameplay Video #2 (HD) High Definition

Two stars are almost exactly the same, but Star A is rotating more rapidly than Star B...?

Two stars are almost exactly the same, but Star A is rotating more rapidly than Star B. How will the widths of the spectral lines of Star A compare to those of Star B?

A. They will be wider

http://cse.ssl.berkeley.edu/bmendez/ay10/2002/notes/lec13.html

If you do bother with the source you will find the answer in 3) a little down the page. They do, however, happen to use the opposite order as your question their B is spinning more rapidly and has a broader line. So don't let that confuse you:)