In 2022, when is the solstice this summer?

June 2117: 0013: 40.

Tuesday, the 23rd day of the fifth lunar month.

Summer solstice, as the name implies, means that summer is coming. The summer solstice means that the hot weather officially begins and then gets hotter and hotter, so there is a folk saying that the summer solstice is not too hot. From summer to the future, although the direct point of the sun gradually moves southward, the days in most parts of the northern hemisphere are shorter and the nights are longer, but the heat radiated by the sun to the ground is still more than the heat radiated from the ground to the air, so the temperature will continue to rise in the future.

When are the sunrises and sunsets on the summer solstice?

Sunrise at 5: 00 16: 48 and sunset at 6: 43 12.

Given the latitude a of the point where sunlight directly hits the earth, we get a formula: t = 12 * arccos (TGA * TGB)/π (applicable to the northern hemisphere) to find the sunrise time of any point on the earth (known latitude b).

According to the calculation, summer solstice: the direct point of the sun is also in the tropic of cancer, a = b = 23 26', which is brought into the formula t = 5.28, and the sunrise time is 5: 00 am16: 48. Sunrise time and sunset time are symmetrical at noon 12, so the sunset time from summer to morning is 6: 43 pm12 seconds.

The time of sunrise and sunset will change with the seasons and latitudes in different places. The summer solstice is the longest day and the shortest night in the northern hemisphere. Most people intuitively think that the sunrise time from summer solstice is also the earliest in a year, and the sunset time is the latest. But in fact, the earliest sunrise usually occurs in the early June before the summer solstice, and the latest sunset is from the end of June to the beginning of July after the summer solstice.

Similarly, although the winter solstice around 65438+February 22nd is the shortest day and the longest night in a year, traditionally, it is believed that the sunrise time of winter solstice is the latest in the northern hemisphere, but in fact the latest sunrise time should be 65438+1early October. Even in the equatorial region, the time of sunrise and sunset will change a little during the year. These changes can be represented by daily trajectories.

The orbit of the earth's revolution is elliptical, which makes the revolution of the earth not constant at a constant speed, and the rotation axis of the earth has an inclination angle of about 23.4 relative to the revolution surface, which causes the above phenomenon. In the same way, the "noon" or "noon" time when the sun rises to the highest position every day does not necessarily coincide with the noon time on the clock 12, so some people who have the habit of "not eating in the afternoon" pay great attention to the real noon time every day.