Photos of the Sun

Lunar eclipse. The solar system with the naked eye

Lunar eclipse. The solar system with the naked eye

An eclipse of the Moon takes place when the Earth stands between the Sun and the Moon. The three celestial bodies are completely aligned, or almost, in such a way that the Earth blocks the solar rays that reach our satellite. This produces a cone of shadow of the planet Earth on the Moon, being obscured.

The lunar shadow consists of two regions. On the one hand, the umbra or shadow, which is the dark area and has a cone shape, and on the other the gloom, what is around. For this reason, lunar eclipses can only take place during the full moon phase. In this phase, when the three celestial bodies align, the Moon penetrates the cone of shadow that the Earth projects in space.

There are three types of lunar eclipses. The partial occurs when only a part of the satellite enters the umbra zone, leaving that area hidden. The total eclipse happens when the Moon fully enters the threshold zone. Finally, in the penumbral eclipse, the Moon enters the penumbra cone of the Earth, crossing only the outermost regions of the earth's shadow, so it barely darkens. The one in the image is a total eclipse that took place in Bulgaria on December 10, 2011.

While solar eclipses can only be seen from a part of the Earth, moles can be seen from any land area at night. The lots require eye protection measures, but the eclipses of Luna can be seen directly and for hours.

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Album: Photos of the Solar System Gallery: The Solar System with the naked eye