Harry Potter being the Master of Death would obviously live long enough to see the human race reach the stars.
Crossover - Harry Potter & Firefly - Rated: M - English - Adventure/Sci-Fi - Chapters: 10 - Words: 77,421 - Reviews: 270 - Favs: 1,206 - Follows: 1,069 - Updated: 5/17/2016 - Published: 11/25/2015 - Harry P., Inara, Wash, R. Tam - Complete