Observations of oscillations on the solar and stellar surfaces have emerged as a unique and extremely powerful tool to gain information on, and understanding of, the processes in the Sun and stars, and the origin of the variability in the solar and stellar output.

Through helio- and asteroseismology (named after the Greek words for the Sun and stars) we can obtain detailed inferences of the internal structure and rotation of the Sun, and extensive information on the properties of a broad range of stars. The solar results provide a unique test of our understanding of stellar structure and evolution for this one, very important star. Also, it gives insight into the operation of the solar magnetic activity which has an important impact on our technological society through the potentially harmful solar eruptions and which may play a significant role in the variations on the Earth’s climate. The stellar results put the Sun into a broader context and furthermore provide a vastly more extensive possibility for testing and understanding the physical processes in stars.

The resulting improvements in stellar characterization and modelling are crucial for broad areas of astrophysics, including the investigation of the structure and evolution of the Galaxy and the understanding of the formation of elements in the Universe.

For a better understanding of the science behind SpaceInn we provide a short introduction into helioseismology and asteroseismology.

The objectives of the SpaceInn WP4 – Helioseismology and WP5 – Asteroseismology are summarised on the linked pages.

More detailed information on the science behin SpaceInn can be found in the educational material we collected here.

Exploitation of Space Data for Innovative Helio- and Asteroseismology