The aim of this Master research is the investigation of the evolution of the moat flow around sunspots. The behaviour of the flow, which is directed radially away from the spot, while the sunspot decays and the interaction with the surrounding network, i.e. supergranules, are analysed.

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Image reconstruction algorithms are today’s most sophisticated tools astronomers have at hand besides telescopes. They are not only used to decrease artifacts, they are also capable of restoring information hidden in the turbulent motion of Earth’s atmosphere. In this thesis two of these algorithms...

Until today, the origin of the solar 11-year activity cycle, in which sunspots emerge predominantly at times of high surface magnetic field strength, has not been sufficiently explained by physical theory.

State-of-the-art dynamo theory uses several different approaches to describe the phenomenon...