Will sunglasses be NOT essential in winter?
As we know, in summer it is hot and the sun is strong, most of us may need a pair of sunglasses when we work or travel out. However, will we still need sunglasses in winter as often as in summer?
Well, if you live at the Northern Hemisphere, where most of human beings reside, yes, sunglasses are not essential since the sun is not that intense.
But if you live at or travel to the South Hemisphere, the case is just the opposite.
Because since the autumnal equinox, the sun lights gradually move south as the earth moves around the sun in an almost round orbit, which is literally an ellipse.
From then on, countries at the South Hemisphere turn hotter than those at the North Hemisphere, until the Winter Solstice, the sun directly shines at the Tropic of Capricorn, which means the longest day length comes at the South Hemisphere.
In conclusion, in January you may not need sunglasses frequently at the north hemisphere, while you trvel to countries at he sourth hemisphere such as Argentina or Australia, you may feel that you still need a pair of sunglasses when the sun welcomes you as fervidly as you have been in summer at the north hemisphere.
About Tropic of Capricorn
Tropic of Capricorn, latitude approximately 23°27′ S of the terrestrial Equator. This latitude corresponds to the southernmost declination of the Sun’s ecliptic to the celestial equator. At the winter solstice in the Northern Hemisphere, around December 21, the Sun is directly over the Tropic of Capricorn and lies within the boundaries of the constellation Sagittarius, having reached its southernmost declination in the ecliptic. Previously, however, it appeared in the constellation Capricornus at the winter solstice—hence the name Tropic of Capricorn. Because of the gradual change in the direction of Earth’s axis of rotation, the Sun will reappear in the constellation Capricornus in approximately 24,000 years.
Well, if you live at the Northern Hemisphere, where most of human beings reside, yes, sunglasses are not essential since the sun is not that intense.
But if you live at or travel to the South Hemisphere, the case is just the opposite.
Because since the autumnal equinox, the sun lights gradually move south as the earth moves around the sun in an almost round orbit, which is literally an ellipse.
From then on, countries at the South Hemisphere turn hotter than those at the North Hemisphere, until the Winter Solstice, the sun directly shines at the Tropic of Capricorn, which means the longest day length comes at the South Hemisphere.
In conclusion, in January you may not need sunglasses frequently at the north hemisphere, while you trvel to countries at he sourth hemisphere such as Argentina or Australia, you may feel that you still need a pair of sunglasses when the sun welcomes you as fervidly as you have been in summer at the north hemisphere.
About Tropic of Capricorn
Tropic of Capricorn, latitude approximately 23°27′ S of the terrestrial Equator. This latitude corresponds to the southernmost declination of the Sun’s ecliptic to the celestial equator. At the winter solstice in the Northern Hemisphere, around December 21, the Sun is directly over the Tropic of Capricorn and lies within the boundaries of the constellation Sagittarius, having reached its southernmost declination in the ecliptic. Previously, however, it appeared in the constellation Capricornus at the winter solstice—hence the name Tropic of Capricorn. Because of the gradual change in the direction of Earth’s axis of rotation, the Sun will reappear in the constellation Capricornus in approximately 24,000 years.
Posted:
September 15, 2023
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