And I think it is important - if people want to argue this is a chance superposition - to explain why there is a bridge at all. There is not an interacting companion to have formed it except NGC 7603B.Originally Posted by turbo-1
And another thing we might ask. Why -if these are just superpositions - don't we see instances where the bridge passes over the companion? Why do these "accidents" always happen such that the bridge terminates at the position of the "background" object?