Air is denser at dawn than at dusk, changing scattering profile. https://physics.stackexchange.com/questions/258553/difference-between-sunrise-and-sunset?rq=1

Air is denser at dawn than at dusk, changing scattering profile. https://physics.stackexchange.com/questions/258553/difference-between-sunrise-and-sunset?rq=1 https://physics.stackexchange.com/questions/258553/differenc...