CREATE TABLE table_39488 ("Spacecraft" TEXT, "Destination" TEXT, "Launched" TEXT, "Closest approach" TEXT, "Time elapsed" TEXT)

What launched has mariner 4 as the spacecraft?
SELECT "Launched" FROM table_39488 WHERE "Spacecraft" = 'mariner 4'
SELECT "Launched" FROM "table_39488" WHERE "Spacecraft" = 'mariner 4'