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The Rotation of the Sun
In this experience, we will discover what the Sun is made of and what are the mysteries behind its dark spots, do you want to join us?
The material for the classroom before coming to ESAC can be divided into two parts:
The Sun is our closest star, at only 150 million kilometers from the Earth. If we compare the Sun with other stars from our Galaxy, the Sun is a standard dwarf star. However, it is 109 times bigger than the Earth !!
Just like other stars, the Sun rotates around itself as well.
The Sun is a big ball of gas and plasma with an onion-like internal structure as it is shown below. The center of the star is around 15.000.000K and it is where the thermonuclear reactions (H into He) take place.
Why is the Sun so hot?
Well, the Sun is continuously collapsing under its own gravity (due to its mass) which creates a region of very high pressures and temperatures that initiate thermonuclear reactions.
Did you know that it takes hundreds of thousands of years for the light to travel from the center of the Sun to its surface? However, it takes only 8 minutes for the light to travel from the surface of the Sun to the Earth.
The Sun's surface can be divided into three main regions: the photosphere, the chromosphere, and the corona.
Size comparison of a "sun spot" with the Earth ( bottom right).
By studying the movement of the "sun spots" we can study the rotation of the Sun. Do you want to try?