When studying the rotation of the Earth around the Sun, can the Sun be approximated as an inertial f

<> the solar system. Because the sun is still leading the eight planets of the entire solar system to revolve around the center of the galaxy.

The position of the Sun in the Milky Way.

So from another point of view, the real trajectory should look like this.

The Sun revolves around the center of the Milky Way.

It's really amazing.

It's a must. If it were not in an inertial frame, the movement of the Earth around the Sun would not be studied.

Within the scope of the solar system, the relative motion of the celestial bodies of the solar system is studied with relativistic mechanics, although it is more accurate to use relativistic mechanics, but Newtonian mechanics is basically sufficient. Newtonian mechanics is based on inertial frames.

Take Newton's first law as an example, "an object can only maintain a uniform linear motion when it is not acted upon by an external force". Newton himself said, "Motion in a given space always remains constant, whether the space is at rest or in uniform linear motion without rotation." "This is defining an inertial frame.

Therefore, Newton's first law is not actually a law, but a definition of a frame of reference. This law also became the basis on which Newtonian mechanics was established.

Although theoretically there is no absolute inertial frame, on a small scale, it is entirely possible to establish a system that is not much different from an absolute inertial frame by some means or method, and to conduct physical research within this system.

The solar system is one such relatively inertial system.

Therefore, when studying the mechanical relationship between the celestial bodies in the solar system, the solar system can basically be regarded as an inertial system centered on the sun. This can be done especially when studying the motion of celestial bodies that are farther away from the Sun. For example, if we study the movement of the Earth around the Sun, we can think of the solar system as an inertial system centered on the Sun.

But when studying celestial bodies that are closer to the Sun, the deviation is even greater. For example, when studying the motion of Mercury around the Sun, because Mercury is very close to the Sun, the relativistic effect is more obvious, and only Newtonian mechanics will be used to study it, which will produce deviations. This is why Mercury's perihelion perihelion is always deviated from reality.

The earth must revolve around the sun, which is an objective law.

1. Characteristics of the Earth's rotation:

1) The direction of the Earth's rotation: from west to east. The north end of the Earth's axis always points to the North Star.

2) Period: The time it takes for the Earth to rotate once (360°). 1 sidereal day is 23:56:4. 1 solar day is 24 hours.

2. The direction, orbit, period, and velocity of the earth's revolution

1) Direction: from west to east. From the North Pole, the Earth orbits the Sun in a counterclockwise direction. It orbits the Sun in a clockwise direction as seen from the South Pole.

2) Orbit: Ellipse, the Sun is located on one focal point of the ellipse.

3) Period: A return year = 365 days, 5 hours, 48 minutes and 46 seconds, 365 days per year is the approximate value of the return year, and nearly 6 hours are thrown away in a year, so 4 years are a run, and a leap year is 366 days. (The annual movement of the sun is used as a reference).

1 sidereal year = 365 days, 6 hours, 9 minutes and 10 seconds (with stars as reference) (4) The speed of the Earth's revolution.

Angular velocity of revolution: It takes one year to make a 360° revolution around the Sun, and it is about 1° to the east every day.

Orbital linear speed: about 30 kilometers per second on average.

It is an objective law that the earth revolves around the sun.

When the earth is rotating, the direction of its angular velocity can be considered from the non-inertial frame. This is because the observer on the earth's surface is in a non-inertial frame, and the trajectory of the object measured by the sock on the earth's surface has inertial centrifugal force, Coriolis force, etc.

First, we need to be clear about the direction of the Earth's rotation. The direction of the Earth's rotation is from west to east, so the direction of the Earth's angular velocity can be defined as the direction of the east-upward direction. Then, we need to consider that the observer's inertial frame on the Earth's surface is not an inertial frame, so the trajectory of the object observed in this frame is affected by non-inertial forces.

These non-inertial forces include centrifugal force and Coriolis force.

Centrifugal force refers to the force that arises due to the motion of a non-inertial center of gravity produced on the surface of the Earth on which the observer is located. Since the angular velocity of the Earth's rotation is up to 15 degrees per hour, this force is small and usually negligible when objects are in motion observed on the Earth's surface.

The Coriolis force, on the other hand, refers to the force that occurs due to the change in the velocity of the motion of the surface of the Earth where the observer is located. When an object moves on the earth, a force is felt along the angular velocity perpendicular to the earth's rotation and the object's velocity. This force can have some interesting effects, such as on the ridge of Mount Everest, where the Coriolis force of the wind, under the right conditions, causes the horizontal air flow to produce a ring of reluctance to form a special cloud form that lasts for several days, a phenomenon known as the "river in the sky".

Therefore, when considering the direction of the angular velocity of the Earth's rotation in a non-inertial frame, the influence of both centrifugal force and Coriolis force needs to be considered.

During the rotation of the earth, the position of the sun directly hitting the earth's surface moves regularly between the Tropic of Cancer, and the tropical position trembles between the Tropic of Cancer

So the answer is: take the Tropic of Cancer

The large rotation of the earth bond will make the side away from the sun smaller and less fast. (Elimination of bridges).

a.That's right. b.Mistake.

Correct answer: B

1) Revolution of the Earth.

The direction is from the west to the east

2) When the Earth turns to A, the Sun shines directly on the Tropic of Capricorn, which is the winter solstice day of the Northern Hemisphere; When the Earth turns to b, the sun shines directly on the equator, which is the vernal equinox in the northern hemisphere; When the Earth turns to rough C, the sun shines directly on the Tropic of Capricorn.

It is the summer solstice in the Northern Hemisphere.

When the earth turns to d, the sun shines directly on the equator, which is the autumnal equinox in the northern hemisphere Therefore, the answer is: (1) (2) winter solstice; Equinox; Summer solstice; Autumnal equinox