NASA’s Psyche mission, which will explore a metal-rich asteroid of the same name, is on track to launch in October 2023 after a one-year delay to complete critical testing. The launch period will open Oct. 5 and close Oct. 25. The asteroid, which lies in the outer portion of the main asteroid belt between Mars and Jupiter, may be the remains of a core of a planetesimal, a building block of a rocky planet.