What is the first stage in the life cycle of a star?

What mainly causes a nebula to collapse and form a protostar?

Most stars, including the Sun, spend the majority of their life in which stage?

Which element is mainly fused during the main sequence stage?

What determines the future evolution path of a star?

What is the explosive death of a massive star called?

What happens to a white dwarf over time?

The Sun is currently in which stage of its life cycle?

Which process stops when a star enters the Red Giant phase?

What marks the end of nuclear fusion in massive stars?