Talk:Mutter's Spiral
Assuming versus knowing
the article has a number of (IMHO) very arguable statements. it seems like the assumption goes that unless we know otherwise that a planet resides within this galaxy, which we can't assume. in the case of the Mandragora Spiral it exists and it hitched a ride in the TARDIS. we can't say where it came from at all. and why does the Jagaroth have to come from our galaxy, for that matter? just two examples.
we can't tell where Leela came from either. just that she comes from human ancestors.
the Doctor Who Universe has unscientifically easy faster than light travel. by 4000 humans have had contacted with multiple species from outside the galaxy. by 5000 Earth ships have already gotten two galaxies away. and Who history goes from now until the next five billion plus years at least.
any given "Earth colony" story may have happened a million years after. so I think unless we have known Whoniverse (like, a hundred light years from Draconian space) or real world (like a star system we know about in the real universe) and unless dialogue says otherwise, we should not make any judgement calls.