Several questions

[Treewyrm]

No, The only way to get to the inside of the Nomad syphere is by flying into the JG in minor.

And the Nomad lair cannot be entered at all, but you can fly around it. Warning, that system is dangerous and only if you know where you are going should you enter it, you nav mao has been dissabled and you can't see the way out.

Verg

But you can still place a map marker on it, lair and two jumpgates are at the center of the map, haven't found the third yet.

What would have been dangerous? A system without a map, markers turned off, one-way jumpholes, high radiation, dense asteroid field and nebula with constant em discharges. And of course our all-time friendly nomads in large numbers with cruise disruptors and paralyzers. That would be dangerous to explore.