The moon goes through its phases in a cycle that typically lasts about 29.5 days, known as a lunar month. This cycle includes changes from new moon to full moon and back to new moon again. Each phase is characterized by how much of the moon is illuminated by the sun as seen from Earth.
The moon appears bright at night because it reflects sunlight from the sun. The moon doesn't produce its own light, but its surface reflects the sun's light back to Earth, making it visible in the night sky. The brightness of the moon can vary depending on its phase and how much of its surface is illuminated by the sun.
The moon reflects so much light because the moon reflect the light of the sun. The amount of light on the moon that is showing is directly related to the position to the moon. (From Answers.com)
A moon phase clock
The phase of the moon you see depends on how much of the sunlit side of the moon faces earth.
The phase of the moon you see depends on how much of the sunlit side of the moon faces earth.
As we see it, it is the full Moon. However, at any time, the Sun is shining on a full side of the moon, so the same amount of light is reflected, but less light is reflected towards us. How much daylight and darkness there is, also affects how much light appears to be reflected from the Moon as we see it. So when the Moon is visible before the Sun sets, it doesn't look as bright as it does after the Sun sets.
The moon goes through its phases in a cycle that typically lasts about 29.5 days, known as a lunar month. This cycle includes changes from new moon to full moon and back to new moon again. Each phase is characterized by how much of the moon is illuminated by the sun as seen from Earth.
The moon appears bright at night because it reflects sunlight from the sun. The moon doesn't produce its own light, but its surface reflects the sun's light back to Earth, making it visible in the night sky. The brightness of the moon can vary depending on its phase and how much of its surface is illuminated by the sun.
The moon reflects so much light because the moon reflect the light of the sun. The amount of light on the moon that is showing is directly related to the position to the moon. (From Answers.com)
Half
A moon phase clock
Phase
How much of it is visible from earth, ie half moon, full moon etc. These are the phases
The only property of the "dark" side of the Moon that keep it from reflecting light is that not much light falls on the "dark" side of the Moon. That's why it is dark! However, this is something of a misnomer. When the Moon is at its crescent phase, when the majority of the illuminated half of the Moon is turned away from Earth, you can still see the "dark side" of the Moon, shining by reflected Earthshine! The light of the Sun hits the Earth, and bounces off. (Not only is the Earth much bigger than the Moon, but it is also much more reflective. You think the full Moon is bright? Wait until you're on the Moon and you see the Full Earth!) The Earth reflects light - more than the Moon does - and some of that light hits the Moon. Only a small percentage of the Earthshine that hits the Moon is reflected back to Earth, but it is enough to see the dimly gibbous Moon with the brilliant crescent.
The phases of the moon are dependant on the relative positions of the sun, moon and earth. It's the angle between the view-lines to the sun and the moon, with you at the vertex of the angle. The phase of the moon you see depends on how much of the sunlit side of the moon faces earth.
The phase of the moon you see depends on how much of the sunlit side of the moon faces earth.