As ponykind extends its reach to other stars, it is alarmed to find that the geocentric nature of its home star system is unique... until it isn't. Pony-settled worlds gradually slow to a stop, and the burden of moving stars and satellites is thrust into the hooves of newly-born alicorns. Prepared to face one new frontier, ponykind suddenly finds itself on the bleeding edge of a totally different one as fundamental, ancient magics warp solar systems to fit its preconceptions.

Elsewhere, for a different people orbiting distant stars, ponykind's unlikely effect on system after system has not gone unobserved. Humanity stares, agape, as physics falls apart before its eyes.

Sooner or later, inevitably, their paths of expansion will cross...

Part I: Curvature: The Weight of Worlds - Complete. An earth pony astrophysicist on Equestria's first extrasolar colony is forced to confront both the perilous nature of her existence in an unstable star system, as well as family she has wrongfully estranged. In order for the colony to survive, Curvature must escape the pull of her own crushing guilt.

Part II: Gregory of Raven's Landing: The Reach of Magic - In Progress. A young griffon ambassador to Equus must represent his colony at a conference of settled worlds. Little does he know much the shape of sentient-controlled space has changed in the last century--and what kind of attention that change has attracted.

Part III: Marie Bisset: The Shape of Space - Planning

Part IV: Hayden Davis: The Breadth of Change - Planning.

Rated T for language. The Human tag refers to the presence of human characters in the story; the ponies themselves are still ponies.

The Twilight and Luna tags are for later chapters; while they have a pretty important part to play in the overall narrative, they are not its main characters.

The prologue and first two chapters were proofread, with my endless and insufficient thanks, by Shortmane and others from the FiMFiction Discord. Seeking an editor.

Cover art by Stellardust, used without permission. If the image offends, I will gladly remove it.