Night out
Evening of 18 June 1982, 10, giant of the northern Hebei Longhua Guo sky suddenly lit by a black, a white light appeared, and soon there is a white disc, leaps from the northeast valley. Then the above quickly spread to the surrounding semi-circular, white and gradually fades, like a side of the large round mirror with white blindfolded, behind the stars clearly visible. Also shot a white light on the mirror, against the backdrop of the mountains, very spectacular sight. "
The above description of the scene, in meteorology, called "day and night out." The sun in the night, although very rare, but not unique. In the "Han this in mind," there reads: "Han was built in April 2002 Shigenobu (AD 139 June 11) is like night and day out." In 163 BC, the Italian had also occurred "day and night out."
Coincidentally ,1596 -1597 the winter, the Arctic is in the long polar night among the trapped Novaya Zemlya in the Russian navigator 威廉伯伦兹 are listlessly pass the time, the calculation of the light coming days. From the pre-sunrise time in two weeks time there, he suddenly saw the 5 degrees below the horizon should be at the location of the sun, suddenly gushing out at the horizon of the South, beginning the polar dark curtain. After a period of time, the sun suddenly disappeared from the, night again shrouded base.
Day and night out as a strange natural phenomenon has aroused great interest. We can be sure that it will not be a real sunrise. Because we all know, the sun goes down is the Earth's rotation Dongsheng result, the earth rotates to go through 24 hours, goes down the sun may rise up again in a short time. Then this is known as "night out" of the strange phenomenon and how is it?
Lead to the root cause of this phenomenon is the atmosphere playing tricks. When the sun below the horizon when the landing is still possible exposure to the sun than the level of the atmosphere, the atmosphere occur if the air layers of different density from the sun below the horizon up into the goal refraction occurs, thus showing the night sky in a mirage of the sun King. |