Callisto's Honesty

Applejack decides one day that she wishes to go out for a day and see things that Equestria has never shown her before. Naturally she goes to Twilight, and Twilight sends her to one of the moons of Jupiter; Callisto. Applejack climbs to the highest mountain peak she can find on the rocky moon and looks to the stars to see Jupiter basking in the sunlight.

...and the spell also gave her the ability to breath on the moon for those who are wondering

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Credit to for the Applejack vector