interplanetary travel meaning in English

行星际飞行

By definition , interplanetary travel is travel between bodies in a given star system
星系旅行是指在给定的行星系统内在不同星体间的旅行。
Scientists are now planning to build a transfer station at l1 between the earth and the moon as the starting point to reach for more remote planets . if successful , interplanetary travel may no longer be a distant dream
科学家正考虑，在未来的日子，首先在地月之间的l1点兴建永久的中转站，成为往后前往各行星旅程的起点，那么，到太阳系旅行，就不再是梦想了。