Spicule (solar physics)

In solar physics, a spicule is a dynamic jet of plasma, about 300 km diameter, in the chromosphere of the Sun. They move upwards with speeds between 15 and 110 km/s from the photosphere and last a few minutes each. They were discovered in 1877 by Angelo Secchi, but the physical mechanism that generates them is still debated.

Spicule (solar physics)

In solar physics, a spicule is a dynamic jet of plasma, about 300 km diameter, in the chromosphere of the Sun. They move upwards with speeds between 15 and 110 km/s from the photosphere and last a few minutes each. They were discovered in 1877 by Angelo Secchi, but the physical mechanism that generates them is still debated.