Why do celestial bodies in the universe rotate?

The celestial bodies in the universe rotate because they have satellites revolving around them, just like the Earth and the Moon, but the gravitational pull of stars (the sun) on the Earth will only cause the Earth to revolve instead of rotating, and only the gravitational pull brought by the moons of celestial bodies will cause the phenomenon of celestial bodies to rotate.

According to the conservation of angular momentum, due to the gravitational force in the universe, the particles of objects in the universe form a vortex, and angular momentum is generated, so the celestial bodies in the universe are constantly rotating.

The rotation of celestial bodies is due to the gravitational force, which causes each body to rotate in its own orbit in an orderly manner.

The formation of a star is a process of accumulation from dilute to thick, and the matter itself is in motion with velocity, and this velocity is integrated and retained, which becomes the speed of the star's spin and the speed of the whole star's motion.

Sketch: The earth revolves around the sun.

A: How does the earth revolve around the sun?

B: The universe is full of dark matter, and dark matter is elastic. Cosmic space is an elastic space network.

A: This, B: The Earth is subject to the elastic forces of the space network in the elastic space network.

A: This, B: The earth is controlled by an elastic force and can only vibrate away from the sun.

A: What about circling the sun?

B: The elasticity of the land and ocean on the earth's surface is different, and the forces are unbalanced after interacting with the surrounding dark matter.

A: The earth rotates.

B: The rotation squeezes the dark matter on one side, and the dark matter produces a reaction force that causes the earth to revolve around the sun.

A: Oh.

It is a well-established fact that the visible celestial bodies in the universe are in endless rotation. This may be something that people take for granted, like the gravitational pull of an apple falling down. But one might wonder why celestial bodies have to be in rotation?

Are there celestial bodies in the universe that do not rotate?

In fact, the rotation of celestial bodies has both the effect of conservation of angular momentum and the effect of energy storage. A planet that is in rotation will store a huge amount of rotational kinetic energy. And once it stops, it's enough to tear the planet apart.

At the time of the formation of celestial bodies, the substances that make up celestial bodies attract each other.

Because they are not aggregated by impact, this results in the celestial bodies retaining a portion of their rotational energy after they are aggregated into a celestial body. This is actually easy to understand, just like playing billiards, if the white ball hits the edge of the target ball, then the target ball will be subjected to a torque and rotate.

Celestial bodies are composed of many small particles, and as the middle core gradually increases, the parts that are later impacted will more or less give the celestial body a part of the rotational kinetic energy. From this principle, it can be seen that if two large celestial bodies merge, then the celestial body formed after the impact will have a faster angular rotational velocity. Some black holes can rotate at alarming angular velocities, while smaller objects will rotate less dramatically.

This leads to the possibility that if a planet is small and it has not been hit by an alien body, it may remain motionless. However, this is very unlikely, because the formation of celestial bodies increases angular momentum, which must be counteracted exactly in order for the celestial bodies to remain in a state of non-rotation.

The sun has a rotation, but it rotates alternately, that is, its rotation has different velocities at different latitudes. It also rotates every 25 days, but it orbits the center of the Milky Way about once every 100,000 years, because the Sun is estimated to be about 10,000 light-years away from the silver core.

Methods of solar observation

A quick and easy way to make observations, in fact, the recommended practice is to use only two blank sheets of paper. One piece of white cardboard is used as a screen, and a pinhole is poked in the other cardboard, holding the pinhole cardboard up as far away from the screen cardboard as possible. The farther apart the two cardboards, the larger the image formed.

Of course, there is an easier way, you only need the help of your own hands, raise your hands up, and the fingers are perpendicular to each other, cross and overlap, so that the hands form a net with many small holes, which can be used as simple imaging holes.

Buying observation glasses or lenses requires a special pair of glasses to protect your eyes. There are glasses with this special sun observation protection lens on the market, ** about 5 yuan. You can't make your own goggles, it's very dangerous.

A basin of water, a small cup is fine, and a relatively large amount of black ink is dripped into the water, which can be observed in the water during a solar eclipse.

All the planets are rotating and revolving, and their energy** is pure nanoblast in the cosmic explosion.

The friction of tides (including solid tides) causes the rotational energy of the planets to dissipate, slowing down the rotation and revolution until it stops. At this time, the expansion of the universe also stops and begins to contract, and time begins to flow backwards.

For example, all the planets in the solar system will crash into the sun when they stop orbiting.

Here's a cause of the Earth's rotation that can be applied to any planet.

There is a very authoritative theory that explains the rotation of the earth and the tilt of the earth's axis in this way:

In the early days of the earth, it was just an asteroid, relying on gravity to continuously capture alien celestial bodies to strengthen itself, and alien celestial bodies were moving at high speed relative to the earth, so the process of capturing was accompanied by violent collisions. The largest impact occurred 4.5 billion years ago, when a large asteroid hit the Earth from the side, causing the Earth to spin, and the material and asteroids that collided out formed the moon, and the crater left by the impact formed the ocean.

Without the Moon, the Earth would wobbly or even turn upside down. The gravitational pull of the Moon is the best stabilizer of the Earth's axis of rotation, pointing the Earth's axis near the North Star and keeping the Earth's axis at 66 degrees 34 minutes from the plane of rotation. So that the earth has four seasons in the year.

In the beginning, the earth rotated very fast, only 5 hours a day, and the deceleration effect of tidal friction became 24 hours a day. This is the story of the formation of the Earth's moon.

So, it is inertia that keeps it spinning, and tidal friction caused by gravitational force slows it down slowly.