Amateur astronomers who missed the previous Eclipse, can not agitate the question, when will the blood Moon in 2021 and will they be able to observe this phenomenon. Despite the fact that in the next few years this will not happen in 2020-2021. the inhabitants of some continents will be able to see not only the partial lunar and solar eclipses. Only most of these phenomena would be difficult to observe without special equipment, which is used by scientists.
Why the moon changes color
The moon constantly orbits the Earth, and in one turn it requires at least 27 days. However, she is also going through a phase with a cycle length of 29.5 days. And the difference between these two parameters is determined by the location of the Earth, Sun and moon relative to each other, and this figure is not constant and changes all the time.
The main condition for a lunar Eclipse is a full moon, when the Sun can fully illuminate the moon’s surface. By itself, the full Moon is not conducive to the emergence of Eclipse: it rotates with a slightly different trajectory than the Sun and the Earth. But if in some point of the plane of these heavenly bodies coincide and line up so that the Earth blocks the sunlight, you can observe the phenomenon of the Eclipse.
You can see both a partial and total Eclipse. In the first case, the Earth only partially blocks the light from the Sun and on the moon’s surface you can see a clear line of shadow. But you can see and penumbral Eclipse, however, do not see a simple man who does not have the relevant equipment (in this phenomenon, the difference is almost imperceptible and not visible without magnification).
Total Eclipse is a spectacular phenomenon: the moon is fully in shadow, that creates the Earth. While sunlight does reach the surface, gradually dissipating in the atmosphere. Given the fact that the red rays of the spectrum (in contrast to the blue and green spectrum) is much harder to dispersion, the satellite looks red or even blood red.
The intensity of the color depends on a number of factors, so it is not always possible to predict how the phenomenon will be spectacular. In particular, it is important which at the time of the Eclipse cloud cover, how much debris in the atmosphere and how it’s contaminated. Usually the most intense color of the blood Moon happens after volcanic eruptions, as well as their date is unknown beforehand, it can be assumed that in 2021 the inhabitants of the Earth should not rely on this phenomenon.
When will the bloody Eclipse
In the beginning of 2020 the first Eclipse was exciting and very spectacular phenomenon: in the night from 20 to 21 January you can see the bloody “wolf” moon, which is very excited believers (they consider it a bad omen that points to war and mass death). The satellite was very close to Earth (on the near point of its orbit) and the inhabitants of some continents (primarily North America and Europe) admired not just bloody, and very large Moon. The whole process lasted more than 3 hours, though the total Eclipse was observed a little longer than 60 minutes. Before that it was possible to see partial and penumbral eclipses, which to the naked eye of a layman was practical invisible.
If to speak about when will the next blood Moon, according to the scientists, in 2021 on such a spectacle should not count. The maximum that can be seen is a penumbral Eclipse, which you cannot see without special equipment. The first one will happen on 10 January, the other two in summer (difference in month — 5 June and 5 July) and the last on 30 November.
Considering that the key prerequisite for the appearance of the red moon is a total Eclipse, it can be assumed that such event will occur only on may 26, 2021. But in this case there is no guarantee that from Earth the lunar surface will appear red, since it must be created certain conditions. But the probability is very high if in the eve of this event, there will be large-scale fires or a powerful volcanic eruption, which will contribute to pollution of the atmosphere.
Looked like a bloody lunar Eclipse: video