. . . "1957Z"^^ . . "Stern, Alan"@en . "Sol Alan Stern"@en . "1957-11-22Z"^^ . . . . "American planetary scientist" . "Sol Alan Stern (born November 22, 1957) is an American engineer and planetary scientist. He is the principal investigator of the New Horizons mission to Pluto and the Chief Scientist at Moon Express.Stern has been involved in 24 suborbital, orbital, and planetary space missions, including eight for which he was the mission principal investigator."@en . . "Alan Stern"@en . .