intergalactic travel meaning in English

星系际飞行

In this brilliant discourse , master addresses the nature of the divine realm , the means by which human beings can see god , the speed of intergalactic travel in ancient civilizations and why these superior cultures have disappeared , the relationship between science and spirituality and the question of free will
这场讲经的精采内容包括：天堂圣境是何情景？如何才能见到上帝？从前地球文明达到高峰时，往来宇宙各星球间只须极短时间。