One of the happiest times of the year make omen today in the northern hemisphere, and in which our country. At the same time, in another part of the world and particularly in the southern hemisphere, Autumn starts.
But what is the vernal equinox;
It happens twice a year, the sun shines vertically above the equator of the Earth and the length of day and night are approximately equal.
Following 20 Of March, in the northern hemisphere is growing day by midsummer, while the opposite happens in the southern hemisphere.
The spring for the northern hemisphere has no fixed date and the first day varies between 19 (even more rarely), at 20 (usually) and 21 Of March, depending on the year.
Spring is shrinking every year
Once again this year, will continue the slight contraction of the spring term, which is shorter by almost one minute compared to last year.
For thousands of years, spring shortens the northern hemisphere and everything,it loses, wins over the summer.
The length of the spring is reduced approximately one hour each time min, while the winter is reduced by almost half a minute per year. Vice versa, The summer grows at an annual rate of one minutes (losing the spring), while autumn increases by half a minute (losing winter).
On the other, while astronomical terms Spring begins with the vernal equinox, in fact -as have found scientists who study the environment- due to climate change the nature enters increasingly early in the spring cycle.
The vernal equinox is celebrated in many parts of the world!!
Every year in the Sun Pyramid in Mexico, hundreds of visitors-many of whom wear white clothes- raise your hands up by sending a greeting to the sun in the footsteps of the Aztecs, which estimated that in this way they can collect energy from the sun's.
The phenomenon of equinox occurs in all planets of each solar system which present inclination of the rotation axis to the plane behavior.
Εαρινή ισημερία και «supermoon» μαζί
This year, vernal equinox coincides with the third and last of yperpanselino 2019.
A rare coincidence will be tonight, as the vernal equinox, which marks the astronomical beginning of spring, almost coincides with the third and final super-moon or yperpanselino of this year.
The "super moon" occurs when there is a full moon while the moon's orbit brings it closer to Earth (perigee), so the satellite of our planet look bigger and brighter than,usual.
The moon followed elliptical orbit and its distance from our planet is not constant. The average Earth-Moon distance is about 384.400 kilometers, but increased by 5% around the peak and reduced to 5% at perigee.
Thanks to its special glow when it is less than 360.000 kilometers from the center of the Earth, the full moon that falls on the perigee designated "super-moon" or "supermoon", non-scientific term introduced in 1979 astrologer Richard phenols.
This year, vernal equinox will occur at midnight Wednesday 20/03 (at 23:58 Greek time zone), while later, at 03:43 h Greece Thursday, will take place a new yperpanselinos. The 2019 there are three yperpanselinoi, all in the first months of the year, and there will not be another until the end of the year (They preceded the other two 21 January 19 February).