Europe’s Hera mission, set to study the aftermath of NASA’s DART impact on the asteroid Dimorphos, has arrived in Florida for final checks before its planned Oct. 7 launch. The mission includes the main Hera spacecraft and two cubesats, Milani and Juventas, which will launch on a SpaceX Falcon 9 rocket. They aim to assess the crater and internal structure of Dimorphos, providing data to improve future planetary defense missions. The spacecraft will reach Dimorphos in late 2026. The launch window extends from Oct. 7 to Oct. 27.