What subjects are essential to study for GCSE in order to become a Astro-physicist (my dream job)?

Question: What subjects are essential to study for GCSE in order to become a Astro-physicist (my dream job)?
- Keywords:
  astro,
  astrophysics,
  education,
  gcse,
  subjects
Asked by Iesha Ahmed to Nicolas on 19 Jun 2017.
- Nicolas Labrosse answered on 19 Jun 2017:
  
  The two key subjects are Physics and Maths. Other than that, if you have the possibility to take astronomy or astrophysics at some point, that is always useful, but not essential (and I’m not sure it’s offered as a subject at GCSE anyway).

Question: What subjects are essential to study for GCSE in order to become a Astro-physicist (my dream job)?