Cover Art by The Sleepless Beholder
In the same "future universe" as The Mane One but neither story needs knowledge of the other.
The Mane One https://www.fimfiction.net/story/474605/1/the-mane-one/the-mane-one
It just explains more how Apple Bloom becomes Goddess of the Moon.
Twilight Sparkle can't handle the sun and moon by herself. They search for a pony who can. The answer becomes clear in Apple Bloom.