About the Revolution of the Earth Why does it orbit the Sun and not hit it directly?

Yes, frictionless motion does not require force to maintain, so the revolution of the earth has nothing to do with the sun. Assuming that the gravitational pull of the Sun could cause the Earth to accelerate from a standstill, the Earth would have to continue to accelerate, not as it does now. If it really all started at rest, there would be only the sun left in the solar system, because everything fell into it.

In other words, the gravitational pull of the sun is not the driving force behind the earth's revolution, the earth has been revolving around the sun since the beginning of formation, even before the formation, which is the origin of the solar system nebula, you can learn more.

As for aphelion and perihelion, as long as they are elliptical, they will exist, in fact, it is difficult to naturally appear in a perfect circular orbit.

Newton said that force is not needed for motion, but force is needed to change motion.

The orbit is closed, some places are near and some places are far, and of course there is perihelion and aphelion.

This is determined by the four basic characteristics of the laws of planetary motion.

The Earth is also a planet in the solar system, and like other planets, it moves according to the same laws.

The orbit of the planets is mainly controlled by the gravitational pull of the sun and the orbital speed of the planets, both of which can allow the planets to move in a stable orbit to a certain extent.

The second feature is that all the planets in the solar system can rotate while revolving around the sun; The repulsive force generated by the rotation of the earth is in relative equilibrium with the sun's attraction, so that it is not sucked in by the sun.

..If you treat [Sun-Earth] as a system, then in this group of particle systems, the gravitational force between the Sun and the Earth can be regarded as an internal force, so it can be seen from the law of conservation of angular momentum in the mass system: the Earth orbits with the Sun as its center, and does not fall to the Sun; It is the bending effect of "four-dimensional space-time" that produces a drag force on the earth (in layman's terms, it is the centripetal force of gravitational force that provides the earth to revolve around the sun), causing the earth to "rotate"...

As for how perigee and apogee are generated, it is due to the fact that the Earth's orbit is not an ideal circle (the principle can be explained by "conservation of the energy group composed of kinetic energy and gravitational potential energy").If there is far-fetched talent, I hope to forgive ..

The route produced by the equilibrium of centrifugal force with gravity.

The principle of dynamic equilibrium (centripetal force, centrifugal force), 2 forces cancel each other out.

The centripetal and centrifugal forces cancel each other out.

It is caused by the gravitational pull between the earth and the sun. Because the mass of the sun is very large, and the sun is an energy radiation, it does not surround the earth.

The earth revolves around the sun because the sun has a gravitational pull, so the earth revolves around the sun, and the gravitational pull of the sun is greater than that of the earth.

Because of gravity, the gravitational pull of the sun is greater than that of the earth, so the earth must revolve around the sun.

The earth revolves around the sun. The movement of the earth around the sun is called the revolution of the earth. Because the earth circles the sun along with other celestial bodies in the solar system, the sun is the central celestial body they share, so it is called "revolution".

The Earth's rotation is counterclockwise, which is the same as the direction of rotation.

The Earth and the Sun are formed by the same nebula, and the rudiments of the Sun are the first to be formed in the entire solar system, and at this time it already has a strong gravitational pull, which is enough to make all the celestial bodies in the solar system move, and the same is true for the Earth. Over time, after all the celestial bodies in the solar system were basically formed, the sun ruled the entire solar system.

The cycle of the Earth's revolution is, in general terms, one year. However, there are four types of astronomical year lengths due to different reference points: sidereal years, regression years, periphysis years, and node years, which use the star, the vernal equinox, perihelion, and the yellow and white nodes as the reference points for measuring the age, respectively.

The earth revolves around the sun. Due to the gravitational field and rotation of the sun, the earth rotates according to a certain orbit of the sun, which is called the earth's revolution phenomenon. The Earth's speed is about 30 kilometers per second, and its shape is an ellipse that is close to a perfect circle.

The Sun is a star located at the center of the solar system, and it is almost an ideal sphere intertwined with hot plasma and magnetic fields. The eight planets in the solar system, asteroids, meteors, comets, outer Neptune objects, and interstellar dust all revolve around the Sun, which revolves around the center of the Milky Way.