On 27 July, the Earth will pass between the sun and the moon, will cast a shadow on our satellite and will color it red. It can be observed long enough, as a total lunar Eclipse will be the longest in the last 100 years.
A total solar Eclipse and total lunar Eclipse are very similar. During a solar Eclipse, the moon passes between the earth and the sun and covers the sun. The shadow of the moon is colorless, since the satellite has no atmosphere, able to reflect and scatter light.
The Earth’s atmosphere filled with nitrogen, which absorbs solar white light and disperses it in the blue spectrum. That is why the sky is blue and the sun appears yellow. To observe the Earth from the moon during a full lunar Eclipse must be very exciting, as you can see, as sunlight passes through the atmosphere of our planet.
It is due to the refraction during a total lunar Eclipse, the moon turns red. In addition, the moon is covered by regolith, which has the property of “inverse dispersion”. Due to this, a lot of light is reflected. During a total lunar Eclipse the scattered sunlight back to Earth.
It should be noted that in this Eclipse the moon will look smaller than usual. The moon’s orbit is not quite circular. For this reason the moon can appear larger or smaller.
This year a total lunar Eclipse will see the inhabitants of Eastern Africa, the Middle East and Central Asia. Great review will have scientists in Antarctica. A total lunar Eclipse will last 1 hour and 43 minutes.
Europe, East Asia and Indonesia will see a partial lunar Eclipse. While we’re waiting, you can read more about prediction of eclipses.