Seasons Astronomy, the astronomical seasons of the seasons

a Analysis:

From the perspective of astronomical phenomena, the change of seasons is the seasonal change of the length of day and night and the height of the sun. In a year, the season with the longest days and the highest height of the imaginary solar difference is summer, the season with the shortest days and the lowest solar height is winter, and the transitional seasons between winter and summer are spring and autumn. Therefore, it is judged to be a.

Completion of the test: This question examines the geographical significance of the earth's movements.

Seasons based on astronomical factors. Since the Earth's axis of rotation is inclined to the plane of its orbit around the Sun (i.e., the ecliptic plane), the amount of solar radiation on the Earth's surface changes regularly once a year. In the same month of the year, each region has its own unique climatic characteristics.

In temperate regions, the hottest period of solar radiation is usually called summer, the period of receiving the least solar radiation, i.e., the coldest is called winter, and the transition period between them is called spring and autumn. For example, in the temperate region of the Northern Hemisphere, March and May are generally spring, June and August are summer, September and November are autumn, and December to February of the following year is winter.

In the temperate zone of the Southern Hemisphere, spring is September and November, summer is from December to February, autumn is in March and May, and winter is in June and August. In ancient China, the beginning of spring, summer, autumn and winter were the beginning of the four seasons, while many countries in Europe and North America celebrated the spring equinox, summer solstice, autumn equinox and winter solstice as the first days of the four seasons. Astronomical seasons, while climatic, do not take into account geographical and weather factors.

The angle of intersection of the Earth's equator and its orbit is the fundamental cause of the change of seasons. In spring, the direct point of the sun gradually moves north from the Tropic of Capricorn, and after the vernal equinox, it crosses the equator and shines directly into the northern hemisphere. In spring, the distance between the Earth and the Sun grows closer and farther away.

Every year around January 3rd, the Earth trembles and the ball is closest to the Sun. From the plane of the zodiac, the Sun is placed on the background of Aquarius, Fish, and Aries.

Answer C: This question examines the four seasons. The division of the seasons is based on the seasonal variation of the height of the sun at noon and the length of day and night. The summer of the Chensun Tomb is the season of the year when the day is the longest and the height of the sun at noon is the largest.

a Analysis: From the perspective of astronomical phenomena, the change of the four seasons refers to the seasonal change of the length of day and night and the height of the sun. In the year, the season with the longest days and the highest solar height is summer, the season with the shortest days and the lowest solar height is winter, and the transitional season between winter and summer is spring and autumn.

Therefore, it is judged to be a. Test Place: This question examines the geographical significance of the Earth's movements.