1AU

1AU is the fifteenth story mission of Destiny 2.

Trivia

 * In astrophysics, AU stands for Astronomical Unit - the average distance between the Earth and the Sun. This unit of distance is typically used when measuring the distances of objects within our Solar System.
 * In this context, the mission title of "1AU" implies the Almighty and Mercury are in the same orbit path as Earth. However, the mission name is more likely used simply for effect as opposed to implying anything about the orbits of the celestial bodies of the Solar System.