What is the position of the sun and the earth at the beginning of autumn? How was the earth formed?

The Earth is the largest terrestrial planet in the solar system in terms of diameter, mass and density. It is the third planet from the inner to the outer solar system. The Moon is a spherical celestial body that revolves around the Earth and is also the Earth's only natural satellite. Below we will share with you the positions of the Sun and the Earth at the beginning of autumn, how the Earth was formed, and how far away the Earth is from the Moon.

Contents of this article

1. The position of the sun and the earth at the beginning of autumn

2. How was the Earth formed?

3. How far is the moon from the earth?

The position of the sun and the earth at the beginning of autumn

At the beginning of autumn, the sun reaches 135° of ecliptic longitude. From the summer solstice to the beginning of autumn and then to the autumnal equinox, the sun gradually moves from the Tropic of Cancer to the equator, and moves from Cancer to Leo. When observing the sky at night, you can see that the handle of the Big Dipper points to the southwest.

The Earth's revolution is regarded as the annual apparent motion of the sun, and its orbit is called the ecliptic. The ecliptic longitude is the metric coordinate on the ecliptic, measured from west to east with the vernal equinox as the starting point, and is divided into 360 degrees in total. Every 15 degrees is a solar term, and there are 24 solar terms in total.

Liqiu is the 13th solar term and the first solar term in autumn, which usually falls between August 7 and 9 in the Gregorian calendar. At Liqiu, the yang energy gradually recedes and the yin energy gradually grows. The precipitation and humidity are at a turning point in the year, changing from heavy rain in summer to less rain in autumn.

How the Earth was formed

The Earth is a mass of gas, ice particles, and dust with a diameter of one to ten kilometers, which originated from accretion collapse. After 10 to 20 million years of growth, the proto-Earth was finally formed. The Earth originated from the primordial solar nebula 4.55 billion years ago.

The Earth is the terrestrial planet with the largest diameter, mass and density in the solar system, and is the third planet from the inner to the outer part of the solar system.

The interior of the earth is divided into the core, mantle, and crust structure, and the external surface is divided into the hydrosphere, atmosphere, and magnetic field.

The shape of the earth is roughly ellipsoidal, slightly flattened along the axis running through the poles, and slightly bulging near the equator.

How far is the moon from the earth?

The average distance between the Earth and the Moon is 384,400 kilometers. The closest distance between the Moon and the Earth is 357,000 kilometers, which is the distance from the Earth's surface to the Moon's surface. The farthest distance between the Moon and the Earth is 406,000 kilometers, which is the diameter of the Moon plus the Earth's diameter. The Moon is the closest planet to our Earth.

The moon is a spherical celestial body that revolves around the earth and is also the earth's only natural satellite. In ancient times, the moon was called Taiyin, Xuantu, Chanjuan, and Yupan.

The moon is the fifth largest satellite in the solar system, with an average radius of about 1,737.10 kilometers, which is 0.273 times the radius of the earth.

The moon itself does not emit light, it only reflects sunlight. The brightness of the moon changes with the angular distance between the sun and the moon and the distance between the earth and the moon. The brightness of the full moon is more than ten times greater than that of the upper and lower quarter moons.