Use words from the box to complete the sentence.
| black dwarf | main sequence | | nebula | protostar | supernova |
During the longest, most stable period of a star's life cycle, force equilibrium is maintained by nuclear fusion. This stage of a star's life is called the .....
42 exam-style questions on Edexcel GCSE Physics 7.3 Stars. Each one has a worked solution and a mark scheme showing where the marks go.