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Question

Is it true that sun is not stationary and revolves or moves around the galaxy?

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Solution

Technically the sun does move.

It's relative motion of the Earth with the Sun that makes us think that the Sun is stationary.

The Sun revolves around the center of the milky way galaxy at 251 km/s. It traces an elliptical orbit around the center of the Milky Way galaxy. At the same time, the Sun also demonstrates disturbances in its elliptical orbit because of uneven mass distribution in the spiral arms of the galaxy. It also oscillates with the galactic plane.

It's also been argued that mass extinction events that happened on the Earth coincide with the Sun's passage through the gigantic spiral arms of the galaxy.

The Sun orbits the center of the Milky Way galaxy in the direction of the constellation Cygnus.

Motion is a relative term. To the planets of the solar system, the Sun is stationary because their relative motion is zero. But with respect to the center of the Milky Way Galaxy or the other stars of the galaxy, the Sun is a very fast moving red giant with a system of planets moving along with it at equal speed.

Same principle as in when you're in a moving train, the passengers are at rest to you, but to the people outside they're moving as fast as the train.

The solar system altogether moves at a velocity of 370 km/s relative to the cosmic background radiation (technically, the oldest light of the universe - it's the remnant radiation of the Big Bang) in the direction of the constellation Leo.

The sun also rotates on its own axis with a rotational period of 25.6 days at the equator and 33.5 days at the poles.

Hope this helps :)


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