You are here: Home USNO Astronomical Applications Astronomical Information Center Phases of the Moon and Percent of the Moon Illuminated
The USNO websites aa.usno.navy.mil, ad.usno.navy.mil, aristarchus.usno.navy.mil, maia.usno.navy.mil, rorf.usno.navy.mil, toshi.usno.navy.mil, and tycho.usno.navy.mil are undergoing modernization efforts. The expected completion of the work and the estimated return of service is Fall 2020, subject to change due to potential impacts of COVID-19.
 

Phases of the Moon and Percent of the Moon Illuminated

Our services have moved here. Please update your bookmarks.