For those who live in the Northern Hemisphere:\nThe Moon is waxing or waning based on whether the right side of the Moon is dark or light. \n\nThe Moon's lighted area increases over time from right to left. \n\nA good diagram of this can be found at: http://www.astro.umd.edu/education/astro/moon/waxing.gif\n\nFor those who live in the Southern Hemisphere the effect is the opposite.\n\nMore details can be found at: http://www.astro.umd.edu/education/astro/moon/phases.html
How can I tell if the moon is waxing or waning?