Autumn hit the 04.29 hours (GMT) of Tuesday, September 23, and will last 89 days and 20 hours. The season will end on December 21 with the arrival of winter, according to the National Geographic Institute. thus begin to fall again in the northern hemisphere, to the time when spring begins in the southern hemisphere. The astronomical start of stations is given, by convention, as the moment when the Earth passes through a given position in its orbit around the Sun. This position, in the case of fall, it is from the center of the Sun as seen from Earth crosses the celestial Ecuador in its apparent southward movement. The day this happens, the length of day and night practically coincide, and so, this circumstance is also called the autumnal equinox. At this time in the southern hemisphere spring begins. The autumnal equinox can occur in four different times, ranging from 21 to 24 September. Throughout the twenty-first century will begin in the fall on 22 and 23 September (Spanish official date), its most of the year's early start on 2096 and the later the start of 2003. 's why the date varies from year to year are due to sequence mode according to the calendar year, and some years are leap and others do not, with the duration of each orbit of the earth around the sun (known as tropical year duration). SHIFT TIME OCTOBER 27 Among the unique features of Fall is the time change, which this time will be effective on October 26, recovering winter time. Likewise, this season is the time of year when the length of day shortens faster, since in the latitude of the Peninsula, the sun rises in the morning, more than a minute later than the previous day and evening each day is shortened two minutes before, so the evening is particularly noticeable. In short, these days the time when the Sun is above the horizon is reduced by almost three minutes each day. Moreover, this fall will live two eclipses will not be visible from Spain. On October 8, a total lunar eclipse will be visible in Asia, Australia, Pacific Ocean and America will occur. This eclipse will be accompanied by part one of Sun, October 23, will be visible in eastern North America. Likewise, the first full this season moon will be Oct. 8, giving the following 29 or 30 days after :. November 6 and December 6 Meteor Showers In autumn you can also enjoy several meteor showers. The first is the Draconid whose maximum is given to the 8 October. Another, also very popular at this time of year, similar event is the Leonid showers, which occurs around November 17 and occasionally becomes very intense. No clutch, the more intense is usually the Geminids, the maximum rate occurs around December 13. Finally, with respect to clusters of stars known as constellations around the North Star will be seen throughout the night Swan , Cassiopeia, Ursa Minor and Giraffe. The ecliptic constellations visible in this period range from Capricorn to Virgo. Above the ecliptic will highlight Pegasus and Andromeda; below, Whale and Orion and the stars Sirius and Procyon.