Table 1.

Key scientific questions of the Solar Orbiter mission addressed by Metis.

Solar Orbiter top-level questions Metis contribution
What drives the solar wind and where does the coronal magnetic field originate? Investigation of the region where the solar wind is accelerated to near its asymptotic value.
How do solar transients drive heliospheric variability? Investigation of the region where the first, most dramatic phase of the propagation of CMEs occurs.
How do solar eruptions produce the energetic particle radiation that fills the heliosphere? Identification of the path of shock fronts accelerating particles in the solar corona.
How does the solar dynamo work and drive connections between the Sun and the heliosphere? Study of the overall magnetic configuration by identifying the closed and open magnetic field regions in the corona.

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