What grades do you need to be an astrophysicist

While Master’s Degrees in Astrophysics do exist and may qualify holders for limited research assistant and consulting positions
It is important to note that the US Bureau of Labor Statistics (BLS) reports that most physicists and astronomers
Astrophysicists
Hold a doctoral degree.

Foundational requirements include
Classes in general chemistry
And linear algebra
As well as computer science
Which applies directly to astrophysical research.
Ideally
Students should choose an undergraduate program that incorporates internships and/or fieldwork experiences.

Astrophysicists typically require postgraduate qualifications, including a master's degree and a PhD

The vast majority of astrophysicists either have PhDs or are in the process of working towards them