Moon since ancient times has been linked to a man with a mystery.
Moonlight was also a mystery.
But modern people available knowledge about how the moon shines and why it is different manifests itself in the sky at different times of the day.
The moon itself does not emit light, since it iscold celestial body: not sunlit lunar surface has a temperature of approximately -200 ° C. It only reflects about seven per cent of the fall of the sun rays on it - a hot star with an intense glow. The brightness of the moon light, compared with the sun, less than a few times. If the Sun suddenly stopped shining, and the moon would be plunged into eternal night. And if the moon had a smooth surface, it would be almost as bright as the sun.
Usually, people can see with the naked eyeMoon in the evening and at night, that is, in the dark. In fact, it reflects the sunlight during the day, but against the background of bright sky it difficult to notice. Although on some days, for example, in cloudy weather, it can manifest itself in the sky more clearly.
Sometimes in the early morning or evening when the sun is not as intense as can be seen in the sky at the same time the sun and moon. This occurs in the intermediate phase of the moon.
As long as the moon revolves around the Earth, different partsilluminated by the sun. For this reason, there is the so-called lunar cycle and it is said that the Moon rises or falls. In certain days of the month, people can see the entire surface of the Moon illuminated (full moon), and on other days - partly illuminated surface (month). There are the following phases of the moon as the new moon, a young moon, quarter, full moon. A complete cycle takes 29.5 days. When the sun shines on the back side of the Moon, its side facing the earth - dark and therefore not visible to man.
When the moon enters the Earth's shadow, the sun's rays do not reach the surface, so night lights are not seen - this is called a lunar eclipse. However, this phenomenon rarely occurs.
Sometimes you can hear about the so-called darkside of the moon. This does not mean that some of her party is not able to reflect light. This expression refers only to the side of the moon opposite to that which it is constantly facing the planet Earth. Images of the back side can be seen on television and on the Internet through the invention of mankind artificial satellites.