Watch the episode again ---- the stars aligned in a perfect pattern that allowed her escape. And who controls the sun and the moon and the stars...? ;) — Lauren Faust (@Fyre_flye) January 25, 2020

It's 2010 and the first two episodes of My Little Pony: Friendship Is Magic, written by Lauren Faust, air on US television. With the plot of the two parter revolving around the return of Nightmare Moon, late 2010 and 2011 saw many theories popping up on exactly what caused the stars to aid in her escape in that moment (besides everything in Equestria seemingly taking place in millenium sized intervals). There were many theories, but we never had outright confirmation on any of them.It being related to Celestia was a popular theory in the fandom for a while, but today Lauren Faust implicitly confirmed it on Twitter. Seems Equestria's former ruler was quite comitted to her plan to reunite with her sister and set Twilight on her path.You can find the tweet below the break or over here