Research group Solar Physics

The Sun is the nearest star to us, and compared to other stars, can be studied in great detail.
swedish solar telescope

The Swedish 1-m Solar Telescope on La Palma. Photographed by Dan Kiselman


For the observations, extensive use is made of the Swedish Solar Telescope on La Palma. The studies focus on the structure of sunspots, small-scale magnetic fields, spectral line formation and the chromosphere.

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The Institute for Solar Physics




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New technology is set to pave the way in predicting solar flares

The Swedish 1-m Solar Telescope (SST) on the Spanish island of La Palma has undergone a significant upgrade. Operated by Stockholm University, this telescope now has a larger field of view, whilst critically maintaining sharpness. Additionally, it has gained the ability to measure light polarisation in a new range of wavelengths.

Institute for Solar Physics

Celebrating the SST at 20 years

20 years ago, in spring 2002, the Swedish 1-m Solar Telescope (SST) saw first light. The full aperture of the telescope was opened on May 21. Already on the next day, May 22, the seeing got good. The very first exposure that was saved on disk was on a sunspot group. It demonstrated in a dramatic way that the telescope produced diffraction-limited images. This image was part of the data used for the first scientific publication  on the discovery of dark cores in penumbral filaments - which was  published in Nature  later in 2002.   During the two decades that have passed since then, the SST has acquired several advanced instruments. It has thus been able to stay on the frontline of solar research and its publication list is continuously growing. Happy birthday SST! 

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