In the very early morning of 28 September, the Earth will obscure the moon, giving it a reddish tone. Here’s what to know in preparation astronomical event not to be missed
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(Photo: Alan Dyer / Visuals Unlimited / Corbis)
We arrived. The appointment with the ‘ Eclipse super moon it is very close and there are many reasons not to miss it. First of all: the spectacle of seeing the Moon (a bit) larger than usual and painted in red is un’alzataccia (if only to follow online , if you are too lazy to put his nose out of the window). But above all, remember that the next time you see an event like that will not be in 2033. In the meantime, here’s what you need to know on ‘ Eclipse superluna , between science and curiosity.
1. What is an eclipse of the Moon
begin going over the basic celestial mechanics and by saying that the lunar eclipses take place only with the Moon . The total eclipse of the Moon occurs when the Earth comes between the Sun and the Moon, and the three bodies are perfectly aligned, so that the Moon falls entirely in the shadow created by the Earth (first passing through areas penumbra).
While not receiving the rays of the Sun (is reflecting sunlight that shines the moon) the Moon in shadow is not invisible, but appears reddish under the filter applied by the atmosphere (see below).
In the case of a partial eclipse rather only part of the Moon is passing through the shadow created by the Earth, while a ‘ penumbral eclipse occurs when the Moon crosses only the penumbra zone (the outermost part of the shadow created by the Earth), and in that case the phenomenon is only slightly perceptible. Since the Moon’s orbit is tilted with respect to Earth’s our satellite centers always these areas of shadow or penumbra, which is why we have an eclipse at every Full Moon.
2. Where and when will be visible
The lucky will be many. The eclipse will be visible from the Americas, Africa, Europe and western Asia. In Italy the phenomenon will begin at 2:11 the morning of September 28 with the entry of the Moon into the cone of Earth’s penumbra. All begin instead to 4:11 and ends at 5:23 . The eclipse itself will end at 7:22 , when the Moon emerge from the twilight zone.
Italy, Africa and all together ‘Asia will observe the eclipse, therefore, near the moon, as well summarized by’ infographic NASA.
3. What does super
orbit our satellite describes around the sun is not circular but elliptical. On average, the Moon passes at a distance of 384 thousand kilometers , but during its course is sometimes nearest (perigee) other farthest (apogee). It’s called superluna full moon coincides with the nearest perigee a year, which for 2015 falls to our 3:52 on September 28, just during totality .
During the perigee Moon There will be far only 356.877 km . The coincidence of superluna with the cover-up of our planet is the reason why we speak of Eclipse superluna . More generally defines superluna a full or new moon that occurs near the perigee. At the superluna (full) the Moon can appear brighter up to 30% and with a diameter greater than 14%.
4. It will be an event (rather) rare
eclipse superluna phenomena are not so frequent. In the last century, said NASA, occurred only five times, the last in 1982. After the 28 September next chance to admire one that will not happen in 2033. Why it is needed that various celestial cycles line up, as explained in the NASA , remembering that the next will be the first of a new series of eight eclipse superlune.
5. A superluna blood If you’re looking
information network certainly will find that while eclipse of a super go for more, there are various names by which we refer to the event. In addition to Harvest Moon (harvest moon, the full moon closest to ‘ autumnal equinox, just past) one of the most popular names there is the Blood Supermoon because Also this will be a Blood Moon. The reddish color as mentioned, is the product of the filter applied by the atmosphere the rays of the Sun, who come indirectly on the moon after being refracted by the edge of the Earth through the atmosphere.
At this stage almost most of the magnetic spectrum frequencies are filtered or diffused by the atmosphere, except for the red , which may appear more intense in the case of a large abundance of particles in the atmosphere (from fire or eruptions, for example).
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