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A selenelion occurs during every total lunar eclipse—it is an experience of the observer, not a planetary event separate from the lunar eclipse itself. Typically, observers on Earth located on high mountain ridges undergoing false sunrise or false sunset at the same moment of a total lunar eclipse will be able to experience it.
A lunar eclipse occurs when the Moon passes within Earth's umbra (shadow). As the eclipse begins, the Earth's shadow first darkens the Moon slightly. Then, the shadow begins to "cover" part of the Moon, turning it a dark red-brown color (typically - the color can vary based on atmospheric conditions).
A total lunar eclipse occurred at the Moon’s ascending node of orbit on Monday, January 21, 2019, [1] with an umbral magnitude of 1.1966. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened.
This eclipse is part of an eclipse season, a period, roughly every six months, when eclipses occur.Only two (or occasionally three) eclipse seasons occur each year, and each season lasts about 35 days and repeats just short of six months (173 days) later; thus two full eclipse seasons always occur each year.
A selion is a medieval open strip of land or a small field used for growing crops, usually owned by or rented to peasants.A selion of land was typically one furlong (660 ft) long and one chain (66 ft) wide, so one acre in area.
An annular solar eclipse occurred at the Moon's ascending node of orbit between Saturday, January 4 and Sunday, January 5, 1992, [1] with a magnitude of 0.9179. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth.
A total solar eclipse occurred at the Moon's ascending node of orbit between Saturday, July 20 and Sunday, July 21, 1963, [1] with a magnitude of 1.0224. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth.
Organoselenium chemistry is the science exploring the properties and reactivity of organoselenium compounds, chemical compounds containing carbon-to-selenium chemical bonds.