APOD: 2008 July 14 - Changes in Angular Mars I had never thought of this—since Mars is further from the sun than we are, we never see Mars (or any other planet further out than we are) in a crescent phase.

APOD: 2008 July 14 - Changes in Angular Mars

I had never thought of this—since Mars is further from the sun than we are, we never see Mars (or any other planet further out than we are) in a crescent phase.