What launched has 158 days (5 months, 8 days) as the time elapsed?
CREATE TABLE "1960s" (
  "spacecraft" text,
  "destination" text,
  "launched" text,
  "closest_approach" text,
  "time_elapsed" text
);
SELECT "launched" FROM "1960s" WHERE "time_elapsed"='158 days (5 months, 8 days)';