Twilight is the faint light which appears a little before sunrise and again after sunset before it gets really dark.
On the moon there is no twilight. Darkness comes suddenly as soon as direct sunlight ceases to reach the moon’s surface. This does not happen on earth because of the halo of air, called the atmosphere, which surrounds it When the sun goes below the horizon, its light leaves the earth but is’ reflected downward from the upper atmosphere.
Poets and writers have written of the evening twilight or “the gloaming”, as it is called in Scotland – as an enchanted time. Perhaps one reason is that familiar objects become distorted in the half-light and we imagine we are seeing things that are not really there.
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