Intergalactic means between galaxies. A galaxy is a huge family of stars; our sun lives in one called the Milky Way. So something intergalactic is happening in the space between those whole families, not just between two nearby stars.

Intergalactic means between galaxiesintergalactic的意思是『在星系與星系之間』。A galaxy is a huge family of stars一個galaxy（星系）是一大群恆星的集合；our sun lives in one called the Milky Way我們的太陽住在一個叫做銀河系的星系裡。So something intergalactic is happening所以intergalactic的事情發生in the space between those whole families是發生在這些整個星系之間的空間裡，not just between two nearby stars不只是兩顆相鄰恆星之間。

In careful science talk, that is a very big distance. In films and games, though actually, people often use intergalactic to mean “way out in space, really far and exciting,” even when the story never leaves one galaxy. Younger speakers may hear it first from Star Wars-style talk; scientists keep it tighter.

In careful science talk在嚴謹的科學用語裡，that is a very big distance那是非常遙遠的距離。In films and games在電影和遊戲裡，though actually不過其實people often use intergalactic to mean “way out in space, really far and exciting,”大家常常用intergalactic來表示『在很遠很酷的外太空』，even when the story never leaves one galaxy就算故事其實從沒離開過同一個星系。Younger speakers may hear it first from Star Wars-style talk年輕人可能最先是從星際大戰那類的說法裡聽到這個字；scientists keep it tighter科學家用得比較嚴謹。

It is not a kitchen-table word. If you only mean “in space,” space or in space is enough.

It is not a kitchen-table word這不是日常隨口會用的字。If you only mean 'in space,'如果你只是想表達『在太空裡』，space or in space is enoughspace或in space就夠了。