When is the tropic of Capricorn with direct sunlight?

Tropic of Capricorn is the solstice in winter.

When the sun shines directly on the tropic of Capricorn, this day is called the winter solstice, that is, 65438+February 22. The days in the northern hemisphere are short and the nights are long, and the phenomenon of extreme night appears in the Arctic Circle. When the sun shines directly on the tropic of cancer, this day is called the summer solstice on June 22. The days in the northern hemisphere are long and the nights are short, and there are extreme days in the Arctic Circle.

When the sun shines directly on the equator for the first time, this day is called the vernal equinox, that is, March 2 1, and the world is divided equally between day and night; The second direct event on the equator is the autumnal equinox, that is, on September 23, the world is divided equally between day and night.

Winter solstice (English: winter solstice), also known as winter festival and happy winter, is one of the twenty-four solar terms and one of the eight astronomical solar terms, as opposed to summer solstice. The solstice in winter is the shortest day in a year. The winter solstice in the northern hemisphere is generally between 65438+February 2 1 and 65438+February 23, and 1 1 month is defined by the month of winter solstice in China calendar.

Why the revolution of the earth is counterclockwise;

1. We know that almost all celestial bodies in the solar system, including asteroids, rotate according to the right-hand rule, and all or most celestial bodies revolve according to the right-hand rule.

The predecessor of the solar system is a dense cloud, which attracts each other under the drive of some force. This accretion process makes the density sparse and gradually increases, which accelerates the accretion process.

At first, the particles in the primitive solar nebula were chaotic and rampaging, and gradually changed the disordered state into an ordered state. On the one hand, they accumulate centripetally and become the sun. On the other hand, the gas gradually develops into a flat state. In the process of development, potential energy was transformed into kinetic energy, and finally the whole thing took a turning point.

At the beginning of turning, some turn this way and some turn that way. After gaining the upper hand in a certain direction, everyone turns to one direction, which is the right-handed rule now discovered. There may be other solar systems that are left-handed, but in our solar system, it is the right-handed rule.

The energy source of the earth's rotation is that the potential energy of matter is finally converted into kinetic energy, and finally the earth revolves on the one hand and rotates on the other.