According to Christian tradition, is a heavenly creature, believed to be superior to men, who serve as servers and messengers of God. In common knowledge, angels often have wings, are owners of a beauty and a shine, and are usually represented as a child, because they have innocence and virtue. One of its missions is to help humanity in its progress towards God.
The name "angel" is generally given to all classes of celestial beings. Almost all world religions accept as fact the existence of angels, giving them different names, but sometimes are described as having features and functions quite different from those identified by Christian tradition.
The christian angelology, which is the study of angels, has its basis in the Bible, as Muslims, Zoroastrians, spiritualist and Buddhists have their holy books that also contains reports of these beings.
In astrology is assigned names to the angels "ambassadors" of the planets on Earth, responsible for the influences of these planets in the life of man.
Among the angels of the Christian tradition is the guardian angel, which as the name implies, is entrusted each person individually at birth, protecting it from evil as far as the divine order allows.
There are also "fallen angels", the most famous is Lucifer and his followers, the demons, but there are many controversies as to who is really Lucifer, as the Bible, when speaking of Lucifer, they are referring to king of Babylon, not Satan.
The Internet is in a growth absurd theory that angels are actually beings from other planets, which from time to time come see how are the humanity, and also interferes with the history.