Science

There are multiple couses available which you can follow after 12th if you have interest in space science, astronomy and astrophysics. Bachelor of Science is a great course for this because it has many specializaions, inclining to your interest like:

• B.Sc Physics with Astrophysics 
• B.Sc  Space and Astrophysics 
• B.Sc Physics and astrophysics with a year in industry
• B.Sc Astrophysics
• B.Sc Physics, Astrophysics and Cosmology 
• B.Sc (Hons) Astronomy and Astrophysics

Yes, of course! You are eligible to be admitted to Delhi University via CUET despite gettng a re-test in either of your class exams as you have an option to appear for you compartment exam. Reappearing for a subject will not affect your eligibility criteria for CUET.

Taking coaching classes is subjective to student's requirement. As per my opinion, coaching class is not mandatory for you to crack CUET. The syllabus, study material and even the previous year question papers are available on web which are more than enough for you to crack CUET. Study topic-wise. Cover all the important questions, whicha have been repeated in PYQs. Prepare your core subject thoroughly and you will be good to go. Believe in yourself, all the best!

Yes, definitely. You can choose psychology for CUET despite having PCB and psychology in class 11th and 12th. The eligibility criteria for B.Sc is to have passed class 12th with a minimum aggregate from a recognised university. It may or may not calls for an entrance exam. 

Thus, if you are interested in pursuing B.Sc Psychology, go get ahead with it. All the best!