Question about creating planets

[Raging Deadstar]

I found this out a couple of days ago, The Tholians destroyed my enemies homesystems star when i was invading, so not only did i lose all my fleet, i had to destroy the nebulae, then create a star, then recreate every asteroid to planets. Of course after i did all the hard work the pesky ai decided to colonise half the worlds in that system because of a regrettable trade alliance. *Sighs* Of course most my stellar manipulations ships can be retrofitted into other kinds as long as i have stored a lot of resources so at least thats a bonus