YOU SAID:
aliens will come to earth.
INTO JAPANESE
エイリアンは地球に来る。
BACK INTO ENGLISH
Aliens come to Earth.
INTO JAPANESE
地球にやってきた宇宙人。
BACK INTO ENGLISH
The Aliens came to Earth.
INTO JAPANESE
エイリアンは、地球に来た。
BACK INTO ENGLISH
Aliens came to Earth.
INTO JAPANESE
エイリアンは、地球に来た。
BACK INTO ENGLISH
Aliens came to Earth.
That didn't even make that much sense in English.