The lunar eclipse and safety precautions on observing the lunar eclipse
The lunar eclipse
The lunar eclipse occurs when the Sun , the Earth and the moon are nearly on one straight line with the Earth in the middle hiding the sunlight from the moon , The lunar eclipse occurs in the middle of the lunar month ( the moon phase is full moon ) at a rate of two lunar eclipses per year
The lunar eclipse can be easily seen from the surface of the Earth , As it lasts for an hour or two hours , in which the surface of the moon gets colored with red and then returns to its original natural color . When the Earth passes in front of the Sun it forms two types of shadow which are :
The cone shadow ( the umbra ) .
The semi shadow ( the penumbra ) .
The types of lunar eclipse
There are three types of the lunar eclipse which are the total lunar eclipse , the partial lunar eclipse , and the semi – shaded ( Penumbra ) lunar eclipse .
The Total lunar eclipse which occurs when the Sun , the Earth and the moon all lie on a straight line with the Earth in the middle . and it occurs when the whole moon enters the shadow area ( umbra ) of the Earth , the moon appears with red colour .
In the total lunar eclipse , although the sunlight is blocked from reaching the moon , there are some rays ( the red rays ) are not absorbed by the Earth’s atmosphere these red rays are refracted ( by the Earth’s atmosphere ) reaching the moon to appear with red color .
The partial lunar eclipse which is a type of lunar eclipses which occurs when a part of the moon enters the umbra region of the Earth , In the partial lunar eclipse , We can see a part of the moon enters the umbra region .
The semi – shaded ( Penumbra ) lunar eclipse which occurs when the moon enters the semi – shaded area only ( the penumbra ) of the Earth in which the moon light turns to be faint without being darkened .
The lunar eclipse started with the semi – shaded lunar eclipse ( in the penumbra region ) then changed into the partial lunar eclipse (a part of moon enters the umbra region ) then changed into the total lunar eclipse ( the whole moon enters the umbra region ) then it changed into the partial lunar eclipse again and finally it changed to the semi – shaded lunar eclipse .
You can watch the Lunar eclipses , They are completely safe to watch , You do not need any kind of protective filters . It isn’t even necessary to use a telescope .
It does not require the precautions , the warnings and the special devices to observe it because it does not cause any harm to the eye .