Making Friends with the Night Sky: The Full Moon

Lunar eclipses can occur during the full moon period

Lunar eclipses can occur during the full moon period

Maui astronomer Harriet Witt describes our full moon, and how the alignment of the Sun, Earth and Moon – syzygy – can affect the planet.

Listen here [3:08m]:

Download here [2.9 Mb]: ftp://space.mit.edu/pub/ajb/radiopio/astrofacts_090801_mfns-fullmoon.mp3

What’s the facts:

Halfway through our lunar cycle, the Moon and the Sun are now on opposite sides of the Earth, so we see a fully sun-lit full Moon.  At this time, the Moon rises as the Sun sets, and the Sun rises as the Moon sets.  This alignment of Sun, Earth and Moon is called syzygy (pronounced “SI-zi-gee“) and occurs during both new and full moon.  This alignment magnifies the ocean tides on Earth (both the Sun and the Moon cause tides through gravitational force), and the full moon is a time when lunar eclipses can occur, about once or twice a year.   Imagine standing on the Moon at this moment; you would see a “new Earth”, or the dark side of the Earth, up in the sky.  Similarly, you would see a “full Earth” during the period of new moon.   In many ways, full moon is a period of opposition.  It is also a period of celebration, with many holidays occurring during full moon in tradiational cultures, such as the Chinese Lantern Festival, the Hebrew Passover, and the Muslim Shab-e-Bara’at.  The bright night also inspires full moon parties.   Have fun celebrating our closest celestial neighbor!

This Astrofact is dedicated to Mahina, our four-legged full moon.

Original air date 1 August 2009.

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One response to “Making Friends with the Night Sky: The Full Moon

  1. Pingback: The Phases of the Moon in Song « Astrofacts!

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