NASA
Nasa Star Child: What Are the Phases of the Moon?
This page provides basic information about the causes of the phases of the Moon. A good diagram shows the lit portion of the Moon as seen from Earth through one complete Lunar cycle.
Woodlands Junior School
Woodlands Junior School: The Phases of the Moon
This resource provides information about the lunar phases.
NASA
Nasa: Eclipses
The periodicity and recurrance of eclipses is governed by the Saros cycle, a period of approximately 6,585.3 days (18 years 11 days 8 hours). It was known to the Chaldeans as a period when lunar eclipses seem to repeat themselves, but...
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