Astronomical Applications

Quartermaster Seaman Kurtis Rodgers, assigned to navigation department, uses a sextant to shoot a line of position toward the sun to verify the position of Nimitz-class aircraft carrier USS John C. Stennis (CVN 74). U.S. Navy photo by Mass Communication Specialist Seaman Apprentice Kyle Steckler.

Data Services

Sun and Moon rise and set times, Moon phases, eclipses, seasons, positions of solar system objects, and other data

• Complete Sun and Moon Data for One Day
• Sun or Moon Rise/Set Table for One Year
• Phases of the Moon
• more...

Astronomical Information Center

Background information on common astronomical phenomena, calendars and time, and related topics

• Rise, Set, and Twilight Definitions
• World Time Zone Map
• Phases of the Moon and Percent of the Moon Illuminated
• more...

Almanacs and Other Publications

Astronomical and navigational almanacs, special publications, research reports

• The Astronomical Almanac
• The Nautical Almanac
• The Air Almanac
• more...

Software Products

Computer almanac for PCs and Macs, and more

• MICA
• NOVAS
• more...