# We are at 240 times the speed of the bullet crossing in the universe, why we know it

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fun to explore Earth is vast universe we live in a grain of tiny dust, present motion state in any object in the universe, there is no absolute rest in the world, only the movement of the eternal.Exercise every day in the earth in the universe, the earth rotates, in addition to the speed of 0.465 kilometers per second also moves around the sun at 29.79 kilometers per second.

the scientists found that the Milky Way is a super rod-shaped galaxies, more than 80000 light-years across, containing about 400 billion stars, our sun is among the more typical of a star, is located in the branch cantilever the Orion arm of the Milky Way is 26100 light-years from the galactic center, our solar system revolves around the galactic center at a speed of 240 kilometers per second, turn a week's time for 226 million years.

we know that the earth is one of the members in the solar system, the earth also with the sun at a speed of 240 kilometers along the same orbit at the center of the Milky Way galaxy, although the speed to match the speed of light, but if the speed compared to the speed of objects on earth?This rate is hard to imagine, the bullet shoot from the gun speed between 300 m and 1000 m per second per second, the limit speed of the bullet is about 1 km per second, if calculated on this, the earth in the universe speed is 240 times the speed of the bullet.

on motorcycles, we can strongly feel that the wind to the cheek, and uneven road to our sense of turbulence, and the surrounding environment of rapid transformation, clearly makes us feel a motorcycle is in motion, but why we are living in 240 times the speed of the bullet on earth for 6.5 million years, without any feeling?

life here on earth, the earth is stationary, relative to the people of the earth's gravity gravity makes the world all things, and the earth's atmosphere by the earth's gravity also gathered around the earth, so the world everything is fixed in the earth gravity, when our earth in high-speed movement, air, and we are together together as the earth's movement, like people on the seal the emu, mu trains on the air and people together with the train movement, we won't feel the wind.Inertia in the universe, the earth is uniform in the movement to the rotation, and moves around the sun, and the sun with the earth revolves around the Milky Way, the earth on the right track at a constant speed operation, if there is some space debris collided with me, because of quality area and the inertia of the earth, let we feel turbulence in the earth.Movement of the earth, but in front of us every day of reference "person" and "content", are relatively static, so nonexistent also the rapid transformation of the surrounding environment.

when we on motorcycles, when cannot feel the air, also can't experience bumpy roads, can't feel the rapid transformation of the surrounding environment.Can you trust a motorcycle is in the movement?Similarly, although the earth at high speed movement, but we can't feel the air, also can't feel the bumps, also can't feel the fast changing environment.Of course we all know that the earth is at 240 times the speed of the bullet through the in the universe.

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Date：2017-05-19