Moon phases occur with a period equal to the synodic period of the moon, equal to 29.530589 days, or 29 days, 12 hours, 44 minutes, 3 seconds.
Educator's Guide to Moon Phases
Courtesy of the Jet Propulsion Laboratory
Easier Done Than Said ...
EnchantedLearning.com
Answers: Label the Moon Phases Diagram
Read the definitions, then label the moon phases diagram below.
Astronomy ...
Moon Phases for 2013, New Zealand dates and times
New Moon
First quarter ...
Moon Phase Almanac
Moon's Perigee & Apogee Dates
Home of the World's Highest Tides -- Bay of Fundy, Canada ...
# Moon Phases Online Finder Algorithm A web-based implementation of mathematical algorithm# Lunar calendar 1971 to 2037 This merely displays a solar Gregorian Calendar with certain dates marked with new, half and full moon phases.
Current Moon Phase
November 25 New Moon Solar Eclipse 2° Sagittarius
Current Solar Data From NOAA ...
Monthly Moon Phases
And the tradional names of the full moons are listed on this page.
Full Moon Names ...
Astronomy basics (moon phases, seasons, solar system, seasonal constellations, etc.)
Current astronomical research
Space exploration ...
Try at the quarter moon phases (when you can see half a circle); the craters are most visible then. Venus, the brightest planet in the sky, displays phases just as our Moon does. We see this because Venus is closer to the Sun than we are.
Why are New Moon phases longer than a sidereal period (27.3 days) apart from each other?
If the Moon was full 7 nights ago, what time of day (night) should you look for the Moon to be up high in the sky in the south today? Explain your answer.
This astronomy calendar of celestial events contains dates for notable celestial events including moon phases, meteor showers, eclipses, occultations, oppositions, conjunctions, and other interesting events.
The Month is taken from the cycles of the Moon phases, which takes about 29.5 days. The Babylonians used 29 and 30 days alternately. The Egyptians used all 30 day months, also the Greeks.
Below you will find photographs of each of the eight Moon phases as well as the names and a brief description of each phase. First, match the name of each Moon phase to the photograph of the Moon during that phase.
A lunar calendar is one in which days are numbered within each moon phase cycle. Because the length of the lunar month is not an even fraction of the length of the tropical year, a purely lunar calendar quickly drifts against the seasons.
As the Moon approaches its New Moon phase, only a decreasingly thin crescent remains (position H in the diagram below). The waning (shrinking) crescent Moon rises after midnight, transits the meridian after sunrise and sets after noon.
Intercalation is the insertion of a leap day, week or month into some calendar years to make the calendar follow the seasons or moon phases. Lunisolar calendars may require intercalations of both days and months....
The Hermetic Lunar Week Calendar is one of many proposed reforms to the Gregorian Calendar. The lunation is divided into the four Moon Phases and has 6, 7, 8, or 9 days depending on the actual time difference between the Full Moon, First Quarter, ...
gibbous (moon): a description of the moon when the visible part is between a semicircle and the full moon. The moon phase may be described as waxing gibbous or waning gibbous. The term may also be applied to the planets.
The Moon
Phases of the Moon
Virtual Reality Moon Phase Pictures
Complete Sun and Moon Data for One Day ...
This very high tide occurs when the moon is both unusually close to the (at its closest , called the ) and in the New Moon phase (when the Moon is between the Sun and the Earth). The proxigean spring tide occurs at most once every 1.5 years.
Astronomy Picture of the Day
What's up this month?
Constellation pronunciation guide
Demonstration of Moon Phases (Java)
Calendar of Planet positions
Try the Mt. Wilson Observatory Constellation Quiz! ...
a longer explanation of the tides and their causes and effects
leap seconds and the slowing of the Earth's rotation
historical info about observations of the Moon
Lunar Meteorites
Moon Phases explained
The impact theory of lunar formation ...
(brightness) of the object; other quantities frequently included in ephemerides include the objects distances from the sun and earth (in AU), usually given as Roman letter "r" and Greek letter "Delta", respectively; phase angle; and moon phase.
a year approximates Earth's tropical year (that is, the time it takes for a complete cycle of seasons), traditionally used to facilitate the planning of agricultural activities. In a lunar calendar, the month approximates the cycle of the moon phase.
 See also: Moon, Phase, Earth, Sun, Phases
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