Science There sure are some clever people on Earth More than two years after launch, NASA's Psyche mission will whizz past Mars on May 15, using the planet's gravity to tweak its trajectory and accelerate on to its asteroid destination. The spacecraft, which was launched on October 13, 2023, will pass just 2,800 miles (4,500 kilometers) above the surface of the red planet at 12,333 mph (19,848 kph) on its way to the metal-rich asteroid, Psyche. Artist's impression of NASA’s Psyche spacecraft Pic credit: NASA/JPL In February, the spacecraft's thrusters were fired for 12 hours to refine its approach to Mars. That refinement played its part in today's flyby. However, it won't be until a Doppler shift is recorded in the signals from the spacecraft as it passes Mars that scientists will be able to definitively confirm its new speed and trajectory. These techniques are not new. Gravity assist maneuvers have been a thing since the dawn of the space age, and were theorized long before.…