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We know it rotates about its axis because we experience day and night - phases through which we face the sun, then turn/rotate away from it.

We know it rotates around the Sun because if it didn't, we'd fall directly towards it.


We know the Earth rotates around the Sun and not the other way around because of inertia and angular momentum. Since the Sun is much larger than us, and therefore has hugely more inertia than us, we know that it must be sitting relatively still, for if it were to rotate around us, our gravitational pull would be insufficient to hold it in orbit. We must therefore be rotating around the Sun as it pulls us in to maintain our orbit around it.


It is just as legitimate to state that the Sun rotates around the Earth at a speed of one revolution per 24 hours, which uses the Earth as a point of reference, assuming it is fixed and stationary in space with the rest of the universe moving around it.

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10y ago
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14y ago

This can be seen quite clearly from the movement of the sunspots.

This can be seen quite clearly from the movement of the sunspots.

This can be seen quite clearly from the movement of the sunspots.

This can be seen quite clearly from the movement of the sunspots.

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11y ago

Because of the sunspots that appear on the sun surface . The sunspots move across the sun surface which makes a movement , this movement indicates that the gases in the sun rotates on its axis

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13y ago

By observing sunspots we can figure out the suns rotational period. The Doppler effect can also be used to detect the speed of rotation. It should be noted that the sun is a large ball of plasma, and plasma has a fluid nature. As a consequence, the sun has what is called differential rotation. The plasma around its equator is rotating more quickly than the plasma nearer the poles.

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12y ago

The rotation of the Sun can be detected by observing the motion of sunspots.

See related link for an animation.

Since the Sun is a ball of gas, it does not rotate rigidly like the solid planets.

In fact, the Sun's equatorial regions rotate faster (taking only about 24 days) than the polar regions (which rotate once in more than 30 days).

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15y ago

The rotation can be seen and measured by comparing the movement of visible points on the sun's surface with the movement of the Earth. Once the Earth's orbit and rotation are accounted for, the remaining observed movement is due to the sun's rotation.

There are mathematical proofs as well, having to do with the shape of the sun, conservation of angular momentum, etc., but the rotational observations are proof by themselves.

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10y ago

One side it's blue shifted and the other side it's red shifted

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7y ago

We know the Sun rotates because we can watch sunspots on the face of the Sun.

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15y ago

One side is blue-shifted and the other side is red-shifted.

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13y ago

sunspots on the Sun's surface seem to move in the same direction, so the sun must b rotating

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Q: The first indication that the sun rotates?
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How do we known the sun rotates?

If sunspots are moving toward east, then sun rotates east


What is unique about how the Sun rotates around its axis?

It is affected by differential rotation. The Sun is not solid and it rotates faster at its equator than at its poles.


How do we know sun rotates?

We know the Sun rotates because we can watch sunspots on the face of the Sun.


How do you know that the sun does not move at all?

The sun actually rotates so it does move.


Does the sun rotate or move?

The sun rotates because it goes around the earth.

Related questions

Does sun rotates arpund the sun?

If you mean whether the Sun rotates around an axis: yes, it does.


Who was the first European to believe that the Earth rotates around the Sun?

Nicholas Copernicus


How do we known the sun rotates?

If sunspots are moving toward east, then sun rotates east


How have astronomers inferred that the sun rotates?

The sun rotates counter clock wise, and the sunspots help with the rotation of the sun.


Does the sun rotates at the same rate that Earth rotates?

No.


Who was first one explain that sun rotates around Earth?

i believe it was galelio but i am not sure


Why is it that the sun rises when the sun rotates west to east?

The Sun appears to rise and set because the EARTH rotates; the Sun just stays where it is.


How do you now the sun rotates?

We know the Sun rotates because we can observe stationary sun spots moving across its surface.


Does the sun rotate at the same rate that the earth rotates?

No. The earth rotates once in about 24 hours. The sun rotates once in about 32 days.


What does the sun do on its axis?

It rotates.


Does the sun rotates to?

Yes


What is found on the surface that proves the sun rotates?

Scientists were able to prove that the Sun rotates by observing the movement of sun spots over time.