Heaven's Gate was an American new religious movement known primarily for the mass suicides committed by its members in 1997. Commonly designated a cult, it was founded in 1974 and led by Bonnie Nettles (1927–1985) and Marshall Applewhite (1931–1997), known within the movement as Ti and Do, respectively. Nettles and Applewhite first met in 1972 and went on a journey of spiritual discovery, identifying themselves as the two witnesses of Revelation, attracting a following of several hundred people in the mid-1970s. In 1976, a core group of a few dozen members stopped recruiting and instituted a monastic lifestyle.

Nichelle Nichols was an American actress, singer and dancer whose portrayal of Uhura in Star Trek and its film sequels was groundbreaking for African American actresses on American television. From 1977 to 2015, she volunteered her time to promote NASA's programs and recruit diverse astronauts, including some of the first female and ethnic minority astronauts.