What are stars made of? group of answer choices
a: pretty much the same as earth, but with a special shell
b: pure energy (light)
c: gases — primarily hydrogen, then helium, traces of other elements
d: combustible hydrocarbon compounds and oxygen
e: superheated metallic elements

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.