THE SUN'S ROTATION

The sun is the star of the Solar System, thanks to it, there is life in the Earth. The group nº 5 of  Nuestra Señora de las Victorias school of 1 of ESO is going to talk to you about an experiment done in the ESAC.

Our hypothesis is that it takes two or three years to the sun to turn around itself. We think that because the sun is larger than the Earth, so it should take more time to rotate, but it is a wrong hypothesis.
To make the experiment they give us some photos taken at the same hour but on different days. In the photos we can see some sun spots. With an inverse proportion we calculate how long takes for the sun to turn around itself. The final result is that it takes 16 days for the sun to turn around itself. Our hypothesis is wrong.
We didn't know that the sun is a sphere of gases,and  the Equator rotates faster than the poles. that´s
why, our  results are different. With those results we can answer the question about if the sun rotates the same at all it's surface. After that, they give us the correct results, the sun needs 30 days to rotate in the poles and 24 days in the Equator. With that information we are doing another experiment that continues the previous one, it would have been easier to do it knowing the difference between the different rotation times.
Even without the information our results were near to the true results thanks to the group's work.
In conclusion, our hypothesis is very different but our results are similar to the real ones.