Sunspots! Let us introduce ourselves…

Original Title:

    Sunspots! Let us introduce ourselves...

        Keywords:

        Sun sunspots rotation period of sun sunspots temperature sunspots topography umbra penumbra.

        Description:

          On Sun’s surface we can see sunspots. What actually are the sunspots? Why are they black? The spots are moving, as the Sun revolves around himself. Can we calculate the rotation period of the Sun? Can we study the topography around the spot? Can we calculate the temperature of the spot peaks? We will try to answer to all these questions, by studying images freely provided by the Astronomical Observatory of Coimbra, the National Schools Observatory and the Faulkes Telescope Project during last month.
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                  The license of the work Sunspots! Let us introduce ourselves… by HIOTELIS IOANNIS
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