In July 2028 NASA launches a car-sized, 1,000-pound nuclear drone toward Saturn’s moon Titan, a six-year, $3.35 billion trip to a world where the air is four times denser than Earth’s, gravity is one-seventh as strong, and flying is the easy part.

In July 2028 NASA launches a car-sized, 1,000-pound nuclear drone toward Saturn’s moon Titan, a six-year, $3.35 billion trip to a world where the air is four times denser than Earth’s, gravity is one-seventh as strong, and flying is the easy part.

NASA is about to try something it has never attempted: instead of another six-wheeled rover, it will fly a car-sized, plutonium-powered drone across the surface of Saturn's largest moon. Dragonfly launches in July 2028 and reaches Titan in 2034. Here's the strange part — Titan is one of the few places in the solar system where flying is easier than it is on Earth. The atmosphere is four times denser than ours and gravity is one-seventh as strong…