In mexico, Next June 20 It will be the longest day of the year and also the shortest night. And this on that date will happen Summer solstice in the northern hemisphere, Which is an astronomical phenomenon that will end spring and announce the beginning of the new season.
According to the Institute of Astronomy of the National University of Mexico (UNAM), the astronomical event will occur specifically at 21:32 at night -Time center state-.
By the tilt of the Earth’s axis on that day Our planet’s north pole will be pointing more directly towards the sun More than at any other time in 2021, leading to the summer solstice in the northern region. But what exactly is this event, and why does it affect its duration, day and night?
The Earth’s axis is an imaginary pole that crosses our planet from top to bottom. As we know, our world turns on this imaginary line, and completes one revolution in 24 hours; This is how the days and nights happen
According to NASA, this Earth’s axis is always tilted 23.5 degrees with respect to the sun. The amounts of sunlight that our planet receives varies In each region, As the Earth moves in its orbit.
When the North Pole points towards the Sun King, the South Pole automatically tilts in the opposite direction. This makes summer begin in our hemisphere, and winter in the southern hemisphere.
“During summer, the North Pole tilts toward the Sun and the South Pole tilts away from the Sun. The Northern Summer Solstice is a time Earth’s north pole points more directly to the sun than at any other time of yearNASA explains.
As of June 20, the North Pole will reach its maximum inclination towards the Sun King, the day will be the longest of the year and the night will be the shortest. However, This does not mean that it will be the hottest day of 2021 in the hemisphere. Although the Earth will absorb a great deal of sunlight during the summer solstice, it takes time for the oceans to warm up, so the temperature difference begins weeks later, between July and August.
The US Space Agency states on its website that “the oceans are slow to warm and remain cool, which has a moderating effect on temperature changes.”
Nor does it mean that our world is closer to the sun. In fact, Earth reaches its closest orbit point to the star in January.
“The Earth is closest to the sun between 3 and 5 January. The difference is a small percentage of the distance, too small to be seen, “NASA noted.
In this way, the summer solstice in the northern hemisphere only indicates that this region of Earth is tilted more towards the star. For this reason, it receives more sunlight and temperatures increase as the weeks go by. This causes the Arctic Circle to be constantly lit during the northern summer, 24 hours a day, and in countries such as Finland and Norway, it is early morning and gets very late, registering a few hours of darkness.