Solar spicule

In solar physics, a spicule, also known as a fibril or mottle,^[a] is a dynamic jet of plasma in the Sun's chromosphere about 300 km in diameter.^[1] They move upwards with speeds between 15 and 110 km/s from the photosphere and last a few minutes each^[1] before falling back to the solar atmosphere.^[2] They were discovered in 1877 by Angelo Secchi, but the physical mechanism that generates them is still hotly debated.

Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).