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A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby obscuring the view of the Sun from a small part of Earth, totally or partially.Such an alignment occurs approximately every six months, during the eclipse season in its new moon phase, when the Moon's orbital plane is closest to the plane of Earth's orbit. [1]
The term eclipse is most often used to describe either a solar eclipse, when the Moon's shadow crosses the Earth's surface, or a lunar eclipse, when the Moon moves into the Earth's shadow. However, it can also refer to such events beyond the Earth–Moon system: for example, a planet moving into the shadow cast by one of its moons, a moon ...
A painting by Lucien Rudaux showing how a solar eclipse might appear when viewed from the lunar surface. [1] A simulation of the start and end of the August 28, 2007 lunar eclipse, viewed from the center of the Moon. [2] Solar eclipses on the Moon are caused when the planet Earth passes in front of the Sun and blocks its light.
Hence there is usually a maximum of one Lunar eclipse with Moon’s penumbral and umbral shadow difference less or greater than 1 each in a given lunar year. Lunar year Twelve (synodic) months, a little longer than an eclipse year: the Sun has returned to the node, so eclipses may again occur: Hexon 6 eclipse seasons, and a fairly short eclipse ...
During the season, whenever there is a full moon a lunar eclipse may occur and whenever there is a new moon a solar eclipse may occur. If the Sun is close enough to a node, then a "full" eclipse [total or annular solar, or total lunar] will occur. Each season lasts from 31 to 37 days, and seasons recur about every 6 months (173 days).
18.999 eclipse years (38 eclipse seasons of 173.31 days) 238.992 anomalistic months; 241.029 sidereal months; The 19 eclipse years means that if there is a solar eclipse (or lunar eclipse), then after one saros a new moon will take place at the same node of the orbit of the Moon, and under these circumstances another solar eclipse can occur.
In contrast the annular solar eclipse of January 26, 2009 (Saros 131, ascending node) occurred 3.3 days after lunar apogee and 7.175% smaller apparent diameter to the sun. And the next solar eclipse of January 15, 2010 (Saros 141, ascending node) was also annular, 1.8 days before lunar apogee, with the Moon 8.097% smaller than the Sun.
In a partial solar eclipse, the magnitude of the eclipse is the fraction of the Sun's diameter occulted by the Moon at the time of maximum eclipse. As seen from one location, the momentary eclipse magnitude varies, being exactly 0.0 at the start of the eclipse, rising to some maximum value, and then decreasing to 0.0 at the end of the eclipse.