Line of nodes

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Related to Line of nodes: descending node
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The orbital planes cross each other at a line of nodes resulting in at least two, and up to five, solar eclipses occurring each year; no more than two of which can be total eclipses.[1][2] However, total solar eclipses are rare at any particular location because totality exists only along a narrow path on the Earth's surface traced by the Moon's shadow or umbra.
The high magnetic field temperature dependence, [[kappa].sub.S]/[[kappa].sub.N] ~ [T.sup.2], suggests the presence of a line of nodes in the gap of the superconducting band, as expected in analogy to URhGe [16].
A transit of Venus across the Sun's face can occur only when the planet reaches inferior conjunction within two days of when Earth is on the line where the tilted orbital planes intersect, called the line of nodes. Earth crosses this line twice a year, on opposite sides of its orbit, nowadays on June 7th and December 8th.