How do I get admission in top international universities like Harvard, MIT for space related post graduate courses?

For Yonsei University, SAT or ACT scores are generally optional but they are highly recommended for Indian UG students. Look at the guidelines given below - 

• If you score high in these entrance exams,  your chances of admission to Yonsei University increase dramatically. 
• Inc

No, the Uni of Alaska does not require Indian students to submit SAT or ACT score for admission to UG courses. The university follows a test-optional policy. This means it is up to the students if they wish to submit either score or not.

Not submitting either score will not have any negative effect o

Yes, students can study at ETAMU without taking the SAT or ACT. The university has a test-optional policy for SAT or ACT scores.

Not submitting either score will not negatively impact admission chances. Other factors like high school GPA, extra-curriculars, and class rank is given priority

No, submitting SAT or ACT scores is optional for Illinois Tech Mumbai BSc program. You can send them if you feel they represent your skills well. If you choose not to, it won't hurt your chances at all. Illinois Tech Mumbai cares more about your daily work in high school. This makes applying for a B

If applicants wish to add scores of any of the standardised tests as supplementary material, then SNU suggests two step process of doing it - 

1. upload a scanned copy of your scores (paper or online) during the time of submitting your application online
2. requesting the corresponding exam authorities