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On Fridays there will be a partial solar eclipse and it will be visible from different parts of the world. According to the Astronomical Observatory of Cordoba the event can be observed in the southern hemisphere in Australia and in the Antarctic Ocean, so that it can be seen in the southern hemisphere. it can not be seen from Argentina.
The time of the greatest eclipse will be on July 13, 2018 at 03:02:16 UTC that is to say at midnight Mendoza . As in Argentina it will be the night the eclipse will not be seen.
The phenomenon will occur 0.2 days before the Moon reaches the perigee and during eclipse, the Sun will be in the constellation Gemini.
The solar eclipse occurs when the moon hides the sun and casts a shadow on the Earth, explain the specialists of Blog of the Observatory . The different types of this phenomenon are due to the angle at which the sun's rays affect the moon, which in turn affects the type of shadow projected in different parts of the Earth.
The three most common types of solar eclipse they are: total, partial and annular. There is a fourth less common type, the hybrid, which is actually a combination of the first.
Partial Eclipse
It is when the moon does not completely cover the solar disk . The shadow of the moon is divided into two regions: the shadow and the dim light. The partial eclipse occurs when the dim light, a partially shaded region of the moon's shadow, is projected onto parts of the Earth. During a partial eclipse, some observers will see an almost overcast Sun, while others located in different parts of the world will observe a rising sun. Partial eclipses can occur alone or as part of an annular or total eclipse.
Annular Eclipse
The moon covers the center of the sun, leaving visible a ring, or ring, solar around the moon . These eclipses occur when the moon is at its peak, that is, when it is closest to the Earth in its orbit. The angular diameter of the Moon is smaller than the solar diameter, so that in the maximum phase, a ring of the Sun's disc remains visible, which occurs in the annularity band; on the outside, the eclipse is partial.
When the new moon is closest to the Earth (perigee, left), the shadow reaches its surface and an observer in A will see a total eclipse. If the new moon is further away (apogee, right), the shadow does not reach the Earth, and an observer in B, in the antumbra, will see an annular ring. Observers in C, in the dim light, will appreciate partial eclipses.
Total eclipse
The Moon completely blocks the visibility of the sun but it happens in some regions of the Earth, in the rest the eclipse is partial. A total eclipse will be observed for the observers located in the Earth which are inside the lunar shadow cone, whose maximum diameter on the surface of our planet will not exceed 270 km and which will go towards the Is around 3200 km / h. . The duration of the whole phase can last several minutes, between 2 and 7.5, reaching more than 2 hours all the phenomenon, although in the annular eclipses the maximum duration reaches 12 minutes and reaches more than 4 hours in the partials, this total area having a maximum width of 272 km and a maximum length of 15 000 km. During a total eclipse, around the Moon, you can see the crown, the outermost and hottest layer of the solar atmosphere.
Hybrid solar eclipse
In some regions of the Earth, this type of eclipse will take on the appearance of an annular eclipse, while in others it will will appear as a total l. Hybrid eclipses occur when the Moon is close enough to cast its shadow over parts of the globe, but far enough away that this shadow does not appear in other regions. The hybrid eclipse begins and ends with the appearance of an annular eclipse, but for a while and for observers inside the shadow, it will appear as a total eclipse. Hybrid eclipses account for about 5% of all eclipses that occur.
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