Will give brainliest! twenty points ! 1. why is a spectrometer important to astronomers? a.) spectrometers measure distances to stars. b.) spectrometers give us data on the light we cannot see with our human eyes. [i think this one might be the answer, but i'm unsure] c.) spectrometers launch telescopes into space. d.) spectrometers are in needed to look at distant stars from earth. 2. which measurement system would we use to measure within the solar system? a.) astronomical unit b.) light year c.) parsec [i think this is the right answer]