母星

mǔxīng
  1. (science fiction) home planet
  2. (astronomy) parent star

CEDICT

astronomy

Entry Composition

1 母 mǔ
  1. mother
  2. elderly female relative
  3. origin
  4. source
  5. (of animals) female
2 星 xīng
  1. star
  2. heavenly body
  3. satellite
  4. small amount