Nemesis theory - Planet X

[Brian G Turner]

Dual moon around the earth? Not encountered that idea before, but it does sound interesting. Do you have any links to that?

Oh - and welcome to the chronicles-network, Fijimand.

 

[Stalker]

Elohim is just a plural of Eloh or Allah that in Semitic language means God.
Ha-shem by Sitchin means people from the shems but this semantics faces serious arguments. There's also another word Nephilim (sp.?)...

 

[Brian G Turner]

Interesting to read an article on New Scientist today, which suggests that the Solar System could have stolen planetoids from a passing star:
http://www.newscientist.com/article...ht-have-stolen-a-miniplanet.html#.VYZ_BUYhEuc

However, it's the section at the end that is especially interesting:

But Bromley points out that the orbits of Sedna-like objects show a persistent alignment that is hard to explain without the "shepherding" effect of a larger planet lurking in the outer solar system. Such a planet doesn't seem to sit comfortably within the passing-star scenario.

My understanding is that the theory of another planet - or dwarf star - had already been discounted. However, this new observation seems to suggest that the possibility is still alive.

 

[Mirannan]

A couple of points:

First, Pluto is the largest object in the Kuiper Belt so far known but isn't the largest known trans-Neptunian object; that honour belongs to Eris, but neither is anything like massive enough to cause the sort of chaos mooted in the Nemesis theory.

Second, whether any large trans-Neptunian object is a planet or a brown dwarf is largely a matter of terminology; superjovian gas giants and brown dwarfs shade into each other, although IIRC some brown dwarfs have a small amount of deuterium fusion. It's also quite possible that there is a really small (M9) red dwarf in an eccentric orbit that just happens to be near its aphelion at the moment; such an object would be difficult to detect.

It's also possible that there is something a lot more exotic out there, such as a neutron star or black hole the precursor star of which blew up in a supernova before the Solar System was formed - or at any rate very soon after. Of course, this would properly mean that the Sun (and its planetary system) is actually in orbit around it. A 4-billion-year-old neutron star would be very inconspicuous indeed.

 

[Ray McCarthy]

We are in a less dense (bubble) of "our" spiral in the Milky way, the result of a supernova before our sun (and our neighbours) existed.

I think Jupiter is about 1/3rd or less than smallest red dwarf known. That's not to say that there are not some smaller than we know red dwarfs, but there is some minimum size for fusion. I have it noted somewhere ... I'm not sure.

We need some better observations

The further from the sun and the Gas giants the easier it is for objects to be in an erratic orbit due to something passing by. But that would disturb the Oort cloud which is a 1000x further away than the Kuiper belt. It's supposedly the origin of most or all comets, so perhaps it was disturbed. There is a lot of mass in it, but of course it's hugely spread out. Mapping all the Kuiper belt and Oort cloud objects of any significant size would end the speculation.
Perhaps the next comet mission should be a piggy back ride back out? Though a LONG time for the orbit.

 

[BAYLOR]

We are in a less dense (bubble) of "our" spiral in the Milky way, the result of a supernova before our sun (and our neighbours) existed.

I think Jupiter is about 1/3rd or less than smallest red dwarf known. That's not to say that there are not some smaller than we know red dwarfs, but there is some minimum size for fusion. I have it noted somewhere ... I'm not sure.

We need some better observations

The further from the sun and the Gas giants the easier it is for objects to be in an erratic orbit due to something passing by. But that would disturb the Oort cloud which is a 1000x further away than the Kuiper belt. It's supposedly the origin of most or all comets, so perhaps it was disturbed. There is a lot of mass in it, but of course it's hugely spread out. Mapping all the Kuiper belt and Oort cloud objects of any significant size would end the speculation.
Perhaps the next comet mission should be a piggy back ride back out? Though a LONG time for the orbit.

Agreed ,It would be nice If we map that region and have idea of whats out there what could be a potential collison threat.