Phases of The Moon

Moonlight

• The Moon does not emit light.

• It reflects the light from the Sun.

• The Moon looks bright at night.

• During the day the Moon cannot be seen because the sunlight is very bright.

The reflection of sunlightto the earth

MoonSun

Earth

Phases of the Moon

• The shape of the Moon changes from time to time.

• The changes occur because the area of the Moon surface that reflects sunlight changes while the Moon is moving around the Earth.

• The phases of the Moon consist of:

– New moon– Crescent– Half moon– Full moon

New Moon

• Occur when the surface of the Moon that is not illuminated by the Sun faces the Earth.

• The Moon cannot be seen from the Earth.

Crescent phase

• Only a small portion of the Moon that is illuminated by the Sun faces the Earth.

• The Moon appears to look like crescent from the Earth.

Half Moon phase

• Half of the Moon surface that is illuminated by the Sun faces the Earth.

• The Moon appears to look like a half circle.

Full Moon Phase

• The whole illuminated surface of the Moon faces the Earth.

• The Moon appears to look like a circle.

• The sequence of these moon phases will repeat consistently.

• The duration of the Moon from one phase to the next similar phase is 29½ days.

Sunlight

Old Crescent

New Moon

Crescent

Half Moon

Gibbous Moon

Full Moon

Gibbous Moon

Half Moon

The various shape from a full moon to a new moon

Lunar Calendar

• The Lunar Calendar is a calendar created based on the revolution of the Moon around the Earth following the phases of the Moon.

• Based on the lunar calendar:

– New Moon can be seen on the first day of lunar calendar.

– Crescent can be seen on the 3th day of Lunar calendar.

– Half Moon can be seen on the 7th day of Lunar calendar.

– Full Moon can be seen on the 15th day of the Lunar calendar.

September 2007

• New Moon – anak bulan

• Crescent – bulan sabit

• Half Moon – Bulan separa

• Full Moon – bulan purnama

• Reflect – memantulkan

• Phases – Fasa

• Lunar Calendar – Takwim Qamari

• Emit – memancarkan