Please correct the following sentence.
That's because of the black holes, which I fall in love with.
I need help here too. I don't understand what you wanted to say, unless you had an astronaut in mind
I want to be a space scientist. I make up my mind to do my utmost to explore and crack the mystery of black hole. The gravity of a black hole is powerful enough to slow down time.
I want to study space because I am fascinated by black holes.
Something like that would be clearer.
If you want to be more poetic:
I want to be an astrophysicist because I have fallen in love with the idea of understanding how black holes work.
Sorry to cut out your fun, guys, but I deleted the posts that I thought might get in the way of helping the original poster.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.