Access private field of a instance object

Question

I have a class, which has one field named orbits (it has the same type as my class Body and has the private modifier):

Answer 1

According to section 6.6.1 of the Java Language Specification:

Otherwise, if the member or constructor is declared private, then access is permitted if and only if it occurs within the body of the top level class (§7.6) that encloses the declaration of the member or constructor.