LUNER ECLIPSE

There are two parts to the Earth's shadow, the penumbra, and the umbra. The penumbra is the outer part of the shadow where sunlight is not completely blocked. The penumbral shadow only dims the Moon every so slightly, in fact unless you are in very dark skies, you may not notice this part of the eclipse at all. The umbra is the actual shadow created by the Earth. You will notice the Moon getting darker from the left side first. During the time when the entire Moon is in the umbra, it is said to be in totality.
Many people are surprised that the eclipsed moon is reddish but there is a reason. Some of the sunlight passes through the Earth's atmosphere and is bent around behind the Earth and towards the moon. The shorter wavelengths of light is scattered and only the longer orange and red wavelengths reach the moon. It is usually just enough light to cast a coppery red hue on the Moon.
There are times however, such as when there have been volcanic eruptions on the Earth, that the light is so scattered that almost no light reaches the moon and it may be so dark as to be not seen at all.
When the Moon is in totality, you will notice that the whole sky gets darker. You may not have realized just how bright a full moon is until it gets blocked out in an eclipse! Notice too that before the Moon started getting darker you could probably only see a few of the brightest stars in the sky, but during totality, you will see many more stars when they are not obscured by the Moon's light.
Totality can last for over an hour and a half and then gradually, the Moon will reappear, first a tiny sliver and soon as the full Moon it had been.