What is "tushita"

Tuṣita (Sanskrit) or Tusita (Pāli) is one of the six deva-worlds of the Kāmadhātu, located between the Yāma heaven and the heaven. Like the other heavens, is said to be reachable through meditation. It is the heaven where the Bodhisattva (Pāli: Setaketu "White Banner") resided before being reborn on Earth as Gautama Buddha, the historical Buddha; it is, likewise, the heaven where the bodhisattva Nātha ("Protector") currently resides, who will later be born as the next Buddha, Maitreya.