Sun and solar activity – basic principles
How it works
The Sun is a star at the centre of our solar system. It consists mainly of hydrogen and helium. In its core, hydrogen nuclei fuse to form helium (nuclear fusion), thereby producing energy that is radiated as light and heat. On the Sun and in its atmosphere, phenomena such as sunspots, prominences and flares are observed, which count as solar activity. Solar activity affects space weather and can have effects on Earth, for example through auroras. The Sun rotates around its axis, with different latitudes rotating at different speeds (differential rotation).
The Sun is a hot star whose energy is produced by nuclear fusion; solar activity is shown in changing phenomena on and above the surface and influences the solar system.
An example
What main reaction takes place in the Sun's core to produce energy?
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50 Exercises
To the learning unit →Own explanation and own practice exercises by AmyMath. Subject reference framework: Astronomy. The topic assignment may vary by federal state.