Astronomy - 6.E.1

Phases of the Moon

Waxing = Illumination increases

Waning = Illumination decreases

Crescent = Moon is less than 1/2

Gibbous = Moon is more than 1/2


Length of Lunar Cycle

It takes 29.5 days,The moon completes its orbit around the earth in 27.3 days.

Tides

Spring : A tide just after a new or full moon, when there is the greatest difference between high and low water.

Neap: A tide just after a new or full moon, when there is the greatest difference between high and low water.

Diurnal: One low tide and one high tide

Semidiurnal: Two low and high tides

Eclipses

Lunar eclipses occur when Earth's shadow blocks the sun's light.

A solar eclipse is a type of eclipse that occurs when the Moon passes between the Sun and Earth.

The outer part of the moon's shadow is called the penumbra.

The inner part of the shadow is called the umbra.

Seasons