We are doing this investigation to guess the velocity of the rotation of the Sun and the time that it takes turning around its axis.
The Sun rotation is important for the Earth because the magnetic fields affect our daily life.
Here we leave a link to provide you more information.
http://cesar-programme.cab.inta-csic.es/index.php?&ChangeLang=es
To find out if the Sun rotates ,we have to look at the Sun spots,those are regions of the Sun that are colder than the others.
The Sun spots are important to guess their velocity and the time that the sun takes turning around its axis, because if we look at one of them at one day, some days later we could see the Sun spot had moved, because the Sun rotates
The problem that we want to solve is guessing the time that the Sun takes to do its rotation movement.
Before doing the investigation we formulated an initial hypothesis. This was the next one :
Since the Sun is a big star, we thought, it would take a long period of time to rotate, that is why we deduced that it lasts 48 days.
The methodology we used was the following:
For measuring the magnitudes of time we used the days, the hours and the minutes; and to measure the magnitudes of distance we used centimetres and kilometres.
In order to find out the velocity of the rotation of the Sun we used some photos which were taken in different days from the Soho satellite ( Solar and Heliospheric Observatory ). These photos show some sunspots in different parts of the Sun. Secondly we chose a concrete sunspot to focus on it and we marked a start point to begin the measurent. After that we calculated the time that the sunspot takes until it returns to the start point.
The result that we obtained was 24 days.
As you can see in the graph, the velocity of the Sun is slowing down as time passes by and the sunspot is nearer than the equator.
Finally, we are going to show you our conclusion.
The Sun has not got a specific time of duration in all of its points because it changes depending on its location, in the poles or in the equator.
Key words: Sun ,rotation, time, sunspots, poles, equator, velocity and axis.
