4 Written questions
4 Multiple choice questions
hot gases pass through cooler gases and absorb wavelengths of the spectrum. It shows up as dark lines on a colored background.
how bright a star seems to be
visible light separated into its different wavelengths/the rainbow
the distance light travels in one year.
3 True/False questions
absolute magnitude → how bright a star really is.
objects that are closer seem to move more than objects farther away
an object that separates visible light into its different wavelengths