在科幻电影中，人类宇航员发现了一颗与地球相似的外星种族母星。

In the sci-fi movie, human astronauts discovered an alien species' ___homeworld that resembled Earth.

在这部科幻小说中，外星种族的母星因战争而被摧毁。

In this sci-fi novel, the alien race's ___homeworld was destroyed by war.