Time

• Official US Time
• Master Clock of the US Naval Observatory
• Time Service Department, US Naval Observatory
• Time and Frequency Division, NIST
• Time and Frequency Service, UK National Physical Lab
• World Time Zones
• Global Time Service
• A Walk Through Time
• Time Information from the US Naval Observatory

Earth, Sun and Moon

• Local Cloud Cover: Infrared Satellite Image
• Clear Sky Clock
• Northampton Weather Forecast from NOAA
• Northampton AccuWeather
• Northampton Wunderground
• The Moon's Phase
• Moon Phase Calendar from Stardate
• Earth and Moon Viewer
• Rise/Set for Sun, Moon, Planets from Farmer's Almanac
• Lunar Apogee and Perigee
• Lunar libration (movie)
• Solar Aphelion and Perihelion
• Solar and Lunar Data from the Naval Observatory
• Ephemeris Data from the US Naval Observatory

The Sky

• This Week's Sky, from Sky and Telescope
• More on This Week's Sky at a Glance From Sky and Telescope
• Night Sky from Space.com
• Tonight's Sky Chart From Sky and Telescope
• Constellations
• Constellation Web Page
• Portraits of the Stars and Their Constellations
• Sky Maps
• Satellite Passes over North American Cities

• Double Stars from Sky and Telescope
• Double Star Club, Astronomical League
• Double Stars by Constellation from Eagle Creek
• Star Clusters from Sky and Telescope
• Nebulae from Sky and Telescope
• Galaxies from Sky and Telescope
• Belmont Astronomy Society- good observing lists
• Observing Lists from SCT Site
• SEDS Messier Objects
• Web Nebulae

Sky Legends

• Solar Folklore
• Sky Mythology
• Constellation Myths
• Constellation Mythology
• Constellation Tales
• Moon Myths

Calendars

• Calendars Through the Ages
• Calendar Systems, Wolfram Research
• Introduction to Calendars USNO
• History of Western Calendar
• Julian and Gregorian Calendars

  Cultures

• ASP Resource Guide for Astronomy of Many Cultures
• Chinese Astronomy
• Dragon Skies, Exhibit on Chinese Astronomy
• Suzhou Star Chart, Adler Planetarium
• Suzhou Star Chart