Sol # 2?

Over the past decade, or so, there are attempts to determine whether our Solar System is totally alone as it is or not. Enticing, but so far inconclusive collections of data on our Solar System seem to indicate at least one more significant player or body. Some try to focus on planet nine which may exist in some obscure way, just out of range of positive ascertainment but has influence. Another pursuit involves residual effects of our Sun's sibling.

Both may seem to be contributing some effects of magnetic/gravitational field influence on our Solar system including its outer orbits of bodies. Both are perceived as being very large in regards to the Solar System's configuration and dimensions.

One should keep in mind that these purports are possible since in recent years science has determined with what we see should not be taken as static. The stars and planets have been moving around, changing positions for billions of years. Orbits change, alignments change. So it is suggested for the case of the Sun's sibling that when it and the Sun were closer together (binary), the other star and the Sun's fields could act as a net which could accrete other bodies as in a net. This is done through tracing trajectory pathways in space and developing computer simulations, which also allude that the Sun and other stars were born together a long time ago and have since wend their separate ways. For now, this is the approach of Avi Loeb and Amir Siraj of Harvard U. Such scenarios could also have played out at other stellar systems. It is possible the Sun's sibling was pulled away from our Solar System by the gravity of another passing star early on.

It is conjectured that planet nine is a captured body that orbits in the outer reaches, and some say it may have a large elliptical orbit and that is why it is not readily detected.