Which of the following can be determined by studying the spectrum of a star?

the chemicals in the atmosphere of the star

the motion of the star

the temperature of the atmosphere of the star

all of the above

The right answer for the question that is being asked and shown above is that: "all of the above." the following that can be determined by studying the spectrum of a star includes: the chemicals in the atmosphere of the star; the motion of the star; the temperature of the atmosphere of the star.