Sunrise or arunika is an event in which the uppermost side of the Sun appears above the horizon to the east. The rising sun is not the same as the dawn, where the sky begins to light, some time before the Sun appears, ending twilight (the event of the sun's light is seen from the end of dusk until dawn). Because atmospheric refraction causes the Sun to be visible while under the horizon, the Sun rises and the Sun sets is, from a single point of view, an optical illusion. The sun also appears larger on the horizon, but it is another optical illusion, the same as the illusion of the moon.
The Sun's revolution westward circled the earth after it emerged from the horizon caused by the rotation of the Earth to the east, an anticlockwise revolution when viewed from above the North Pole. This illusion is very convincing that many cultures have mythology and religion based on geocentric models. The same effect can be seen with satellites near the poles.
