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Une saison d'éclipses est la période duran … Une saison d'éclipses est la période durant laquelle les nœuds de l'orbite lunaire sont placés tels qu'une éclipse puisse se produire si la Lune arrive à un des nœuds de son orbite. Produisant une éclipse lunaire ou bien solaire selon que le nœud considéré est placé avant ou après la Terre (vu du Soleil). Une saison d'éclipses dure entre 31 et 37 jours, durant laquelle il se produit au moins 2 éclipses (de Lune et de Soleil) ; et jusqu'à 3 éclipses : 2 de Lune ou de Soleil, « encadrant » une éclipse de type opposé (de Lune ou de Soleil) ; dont celle-ci se produit vers le milieu de la saison d'éclipses. Les saisons d'éclipses durent environ un peu plus d'un mois (juste plus d'une lunaison) et se suivent tous les 173,31 jours (une demi-année draconitique).73,31 jours (une demi-année draconitique).
, An eclipse season is the period, roughly e … An eclipse season is the period, roughly every six months, when eclipses occur. During the season, the "lunar nodes" – the line where the Moon's orbital plane intersects with the Earth's orbital plane – aligns with the Sun and Earth, such that a solar eclipse is formed during the new moon phase and a lunar eclipse is formed during the full moon phase. Only two (or occasionally three) eclipse seasons occur during each year, and each season lasts about 35 days and repeats just short of six months later, thus two full eclipse seasons always occur each year. Either two or three eclipses happen each eclipse season. During the eclipse season, the Moon is at a low ecliptic latitude (less than around 1.5° north or south), hence the Sun, Moon, and Earth become aligned straight enough (in syzygy) for an eclipse to occur. Eclipse seasons should occur 38 times within a saros period (6,585.3 days). The type of each solar eclipse (whether total or annular, as seen from the sublunar point) depends on the apparent sizes of the Sun and Moon, which are functions of the distances of Earth from the Sun and of the Moon from Earth, respectively, as seen from Earth's surface. These distances vary because both the Earth and the Moon have elliptic orbits. If both orbits were coplanar (i.e. on the same plane) with each other, then two eclipses would happen every lunar month (29.53 days), assuming the Earth had a perfectly circular orbit centered around the Sun, and the Moon's orbit was also perfectly circular and centered around the Earth. A lunar eclipse would occur at every full moon, a solar eclipse every new moon, and all solar eclipses would be the same type.all solar eclipses would be the same type.
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Une saison d'éclipses est la période duran … Une saison d'éclipses est la période durant laquelle les nœuds de l'orbite lunaire sont placés tels qu'une éclipse puisse se produire si la Lune arrive à un des nœuds de son orbite. Produisant une éclipse lunaire ou bien solaire selon que le nœud considéré est placé avant ou après la Terre (vu du Soleil). Les saisons d'éclipses durent environ un peu plus d'un mois (juste plus d'une lunaison) et se suivent tous les 173,31 jours (une demi-année draconitique).73,31 jours (une demi-année draconitique).
, An eclipse season is the period, roughly e … An eclipse season is the period, roughly every six months, when eclipses occur. During the season, the "lunar nodes" – the line where the Moon's orbital plane intersects with the Earth's orbital plane – aligns with the Sun and Earth, such that a solar eclipse is formed during the new moon phase and a lunar eclipse is formed during the full moon phase.ipse is formed during the full moon phase.
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Saison d'éclipses
, Eclipse season
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