Building Harlequin's Moon

<The first interstellar starship John Glenn fled a Solar System populated by rogue AIs and machine/human hybrids threatened by too much nanotechnology and rife with political dangers. The John Glenn's crew intended to terraform the nearly pristine planet Ymir in hopes of creating a utopian society that will limit intelligent technology.But by some miscalculation they have landed in another solar system and extremely low on the antimatter needed to continue to Ymir they must shape the nearby planet Harlequin's moon Selene into a new temporary home. Their only hope of ever reaching Ymir is to rebuild their store of antimatter through decades of terraforming the moon.