Is the Milky Way racing at 2 million kilometers per hour?

Looking up at the starry sky, none of the stars are forbidden, and every one of them is soaring at high speed. Take our earth as an example, sitting on the ground and traveling 80,000 miles a day is really happening. The rotation period of the earth is 24 hours, the circumference of the equator is 80,200 miles, and it can travel 80,000 miles a day while standing on the earth.

The solar system is located on a spiral arm of the Milky Way, about 10,000 kilometers from the center of the Milky Way, and the entire solar system is led by the sun to orbit the supermassive black hole in the galactic center at a speed of 250 kilometers per second, about 100 million years around the galactic center.

The entire Milky Way is subordinate to the Local Group of Galaxies, which contains about 50 galaxies, including our companion galaxy, the Large Magellanic Galaxy, and the Andromeda Galaxy, which will collide and merge with the Milky Way in 304 billion years, and so on, and the Local Group occupies an area about 10 million light-years in diameter. The galaxies in this group of galaxies are all rotating around a common center of mass, and are constantly approaching the Andromeda Galaxy, and finally colliding and merging.

Continuing to dig deeper, the galaxies near us, including the Milky Way, also have a common "goal", that is, the giant gravitational source in the deep space of the universe, which is about 100 million kilometers away from us, and the Milky Way is rushing towards the giant gravitational source at a speed of 600 kilometers per second.

The movement of celestial bodies in the universe is ultimately due to gravity, and gravity exists because of mass. Newton was the first to discover gravitational attraction and thought that the moon could hang in the sky and fall to the earth when an apple was ripe. Einstein explained gravity in a more essential way, that is, the concept of space-time curvature, because the existence of mass causes space-time to bend, and the movement of objects in curved space-time shows gravitational force.

At the center of the Milky Way is a supermassive black hole, about 4.3 million times the mass of the Sun, but it can only "constrain" the universe in diameter of almost 200,000 light-years. And the giant source that allows the entire galaxy to move at high speed must have a mass that weighs at least tens of thousands of galaxies. From the current point of view, the Milky Way belongs to a member of the Laniakea supercluster, which is more than 500 million light-years in diameter, and the center of this supercluster is what astronomers call the giant gravitational source, according to the current rate of the cosmic expansion effect, the Milky Way will reach the giant gravitational source in more than 100 billion years.

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All the planets in the galaxy are moving, that is, they are racing at high speed, don't look at the stars in the sky are not moving, we think they are not moving, in fact, they are all soaring.

Yes, the Milky Way moves very fast. He is very attracted, which causes it to move very fast, but we can't see this high-speed movement with the naked eye.

If this speed is soaring, it will run very fast in the Milky Way, and under the leadership of the sun, the Milky Way will move very fast and faster.

Of course, there is such a speed, because they are all in motion. It's very scary to keep moving all the time, so it's normal for the whole universe to say that this phenomenon is normal.

It is true that the Milky Way is racing at a very fast speed, but what exactly attracts the Milky Way, scientists have not got accurate results, which can only show that the universe is really mysterious.

The motion of matter Yes, the motion is relative, there is no absolute rest, only rest with respect to a certain reference.

Absolute in motion, relative at rest, the apple breaks away from the earth's gravitational pull and enters space, and this apple is mainly affected by the sun's gravity and revolves around the sun. After a few days of decay or being crushed by other meteorites, it will decompose and disappear.

Of course, you can feel it, or the celestial bodies in the galaxy are constantly running. The wind is not small, but fortunately, the sand and dust are not big, and it feels almost.

As for the apple, it is too small, and even if it breaks away from the earth's gravity and enters space, it may not be bitten by someone.

The earth has an atmosphere.

Apples revolve around the sun.

lz, it doesn't make sense to calculate absolute velocity alone.

For example, if it moves in a straight line at a uniform speed, no matter how fast the speed is, the interior of the system is no different from stationary, and the solar system revolves around the center of the Milky Way with a radius of 10,000 light-years, although the speed per second in the orbit is 250 kilometers.

However, since it takes 170,000 light-years to go around one circle, it takes 100 million years to go around one circle, so the angular velocity can be calculated as 670,000 years to go 1 degree.

According to the centripetal force formula f direction = mr 2 = mv 2 r centripetal acceleration is so small that it tends to 0, far less than the gravitational acceleration, of course, people on the earth can not feel that if the apple reaches the first cosmic velocity, it can fly away from the surface of the earth and revolve around the earth, exceed the second cosmic velocity, be able to fly away from the earth and revolve around the sun, and exceed the third cosmic velocity, it can fly away from the sun and revolve around the galaxy.

Of course, it follows the revolution of the Milky Way.