Question

1. which of the following does spectroscopy not determine? a stars density constellations a stars distance from earth a stars mass

Explanation:

Spectroscopy is a technique that analyzes the interaction of light with matter. It can provide information about a star's density (through line broadening related to pressure), a star's distance from Earth (using redshift or blueshift in spectral lines for Doppler - based distance estimations in some cases), and a star's mass (by analyzing spectral features related to gravitational effects on the star's atmosphere). However, constellations are groupings of stars based on their apparent positions in the sky from Earth's perspective, which is a purely observational and positional categorization not determined by spectroscopy.

Answer:

constellations