Simplify the following text for a Grade 7 native English-speaking person.
Original: Mira is a binary star system that consists of a red giant ( Mira A ) undergoing mass loss and a high temperature white dwarf companion ( Mira B ) that is accreting mass from the primary .
Simplified: Mira is a binary star system with a white dwarf ( Mira B ) star and a red giant ( Mira A ) .