Heather Petersen was a strawberry-blonde female Human in the 24th century. In 2371, Petersen studied the Bajoran wormhole and worked with the crew of Deep Space 9 when the Unclean threatened the Gamma and Alpha Quadrants. (DS9 - Invasion! novel: Time's Enemy) In 2372, distinguished by her work in applied temporal physics and less than two months out of Starfleet Academy, Ensign Petersen served as science officer aboard the upgraded Soyuz-class USS Bozeman, then attached to the Federation Department of Temporal Investigations for missions requiring Starfleet support.