Share this postThe Classroom Astronomer Newsletter #9 - September 16, 2021classroomastronomer.substack.comCopy linkTwitterFacebookEmailThe Classroom Astronomer Newsletter #9 - September 16, 2021The Color of the Sun and Stars; Free Labs; Seeing Kepler's Second Law; RAP Sheet--Determining Star Distances, Presentations after COVIDSep 16, 2021CommentShareThis post is for paid subscribersSubscribeAlready a paid subscriber? Sign in
