How should those holes fly across the universe ? ???
( We need a "spaceship" that flies to other planets , and no, it has not to be realistic! Even rocket bugs or something like this are possible )
Maybe something like this? :
(http://img1.wikia.nocookie.net/__cb20090315234834/gundam/images/thumb/a/a3/Innovator_Mothership.jpg/300px-Innovator_Mothership.jpg)