It watched.
Every race, when sufficiently advanced, comes to make fundamental observations about the world around them.
Time is relative to frame of reference.
Magical inertia is overcome by conscious manipulation and imagination.
E=mc2
Observation introduces change.
The accumulation of hard facts and figures, the rote memorization of information on a species-wide scale, shapes a people until they attain the tools to survive. The world was designed to be so, according to its plans.
It watched.
Ponykind had finally reached a point in its development where they could leave their cradle-planet and explore their greater home. Magical pulse drives mounted on reinforced frames of titanium and arcanite ventured forth from Equus to learn about their solar system.
Celestia’s magical power was accurately measured away from her center of influence. Colonies and outpost spread throughout their home system. Time went by.
It watched.
Curiosity is a powerful force and the unknown an irresistible pull. It knows - it designed it that way.
It watched Celestia watch her ponies leave her domain. Like a parent watching her children leave home for the final time, she wished them well with the heaviest of hearts.
She was alone.
Its design continued to function.
And it was glad.