Firstly, I know that earth has a magnetic field and I seem to remember reading somewhere that the sun has multiple magnetic fields.
Extending this a bit further, does the galaxy have a larger magnetic field and if it did would there be any way to look at it, from earth?
This made me wonder about whether a black hole could have a magnetic field, despite the strong gravity? and what would that look like?
My other question involves "free-roaming" planets, my view is 2-fold, firstly if planets are as common as it appears from recent observations? what happens when stars explode in supernova's, I had the view that the planets close to the star when that happens will very likely get swallowed by the exploding star, but if the planets in the outer orbits survive the explosion they would just drift off into space
My other thought was could systems develop without the star at the core, hence sort of dark systems just drifting through space, which led me to wonder about how common this sort of thing would be, and perhaps when we see planets in odd orbits etc are planets that were caught by the stars gravity as it traveled past.
So my questions are is there any info on this sort of thing or is there any evidence at the moment regarding this stuff
Also could I get some thoughts from the forum regarding these questions, just trying to get some discussion going around both of these issues.