valgussäde

Valgussäde, also known as a solar prominence, is a large, bright feature extending outward from the Sun's surface. These structures are anchored to the Sun's photosphere and extend outwards into the corona. Prominences are formed by the Sun's magnetic field, which traps hot gas in a loop-like shape. They can erupt, shooting out as coronal mass ejections (CMEs), which can have significant impacts on Earth's magnetosphere and cause geomagnetic storms.

Prominences are typically associated with sunspots, which are areas of intense magnetic activity on the Sun's surface. They are often observed during the solar maximum, the period of greatest solar activity in the Sun's 11-year cycle. Prominences can be categorized into two types: quiescent and active. Quiescent prominences are long-lived and relatively stable, while active prominences are shorter-lived and often associated with solar flares.

Valgussäde can be observed using specialized telescopes equipped with hydrogen-alpha filters, which allow for the observation of the Sun's chromosphere, the layer of the Sun's atmosphere where prominences are most visible. These observations are crucial for understanding solar activity and its potential impacts on Earth and space weather.