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Lunar eclipse
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== Occurrence == {{see also|Saros (astronomy)|Eclipse cycle}} [[File:Eclipse vs new or full moons, annotated.svg|thumb|As the Earth revolves around the Sun, approximate [[axial parallelism]] of the Moon's orbital plane ([[Orbital inclination|tilted]] five degrees to the [[ecliptic|Earth's orbital plane]]) results in the revolution of the [[lunar nodes]] relative to the Earth. This causes an [[eclipse season]] approximately every six months, in which a [[solar eclipse]] can occur at the [[new moon]] phase and a lunar eclipse can occur at the [[full moon]] phase.]] At least two lunar eclipses and as many as five occur every year, although total lunar eclipses are significantly less common than partial lunar eclipses. If the date and time of an eclipse is known, the occurrences of upcoming eclipses are predictable using an [[eclipse cycle]], like the [[saros (astronomy)|saros]]. Eclipses occur only during an [[eclipse season]], when the Sun appears to pass near either [[lunar node|node]] of the [[orbit of the Moon|Moon's orbit]].
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