An eclipse. (TV: "The Day of Darkness")

An eclipse was, according to what Autloc once told Barbara, when the Moon passed before the sun and caused darkness.

Aztec tradition required that during an eclipse, a human sacrifice — indeed, the "Perfect Victim" — be given to the Sun God. (TV: "The Bride of Sacrifice")

When Tycho Brahe was fourteen, he witnessed a solar eclipse in Denmark. The fact that it was predicted inspired Brahe to become an astronomer. (COMIC: Herald of Madness)

In France in July 1794, the First Doctor, as part of his plan to escape from a road works overseer, claimed that there would be an eclipse, distracting the overseer long enough for the Doctor to take some money from his purse. (TV: "Guests of Madame Guillotine")

The Tenth Doctor watched a solar eclipse in the Arctic in 2019. He found it was beautiful. (COMIC: Arctic Eclipse)

In 2400, the Daleks planned to use a solar eclipse in a plan to destroy Earth, but were defeated. (COMIC: Battle for the Moon)

All three suns of the Planet of Light were eclipsed once every three hundred years, resulting in a brief period of darkness which caused the inhabitants to go insane with fear and destroy their civilisation. (COMIC: World Without Night)

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