What is interstellar reddening?
A) Interstellar dust absorbs more red light than blue light, making stars appear redder than their true color.
B) Interstellar dust absorbs more red light than blue light, making stars appear bluer than their true color.
C) Interstellar dust absorbs more blue light than red light, making stars appear redder than their true color.
D) Interstellar dust absorbs more blue light than red light, making stars appear bluer than their true color.
E) The spectral line shift due to a star's motion through the interstellar medium.
Answer: C