<P> In solar physics , a spicule is a dynamic jet of about 500 km diameter in the chromosphere of the Sun . It moves upwards at about 20 km / s from the photosphere . They were discovered in 1877 by Father Angelo Secchi of the Observatory of Roman Collegium in Rome . </P>
<P> In solar physics , a spicule is a dynamic jet of about 500 km diameter in the chromosphere of the Sun . It moves upwards at about 20 km / s from the photosphere . They were discovered in 1877 by Father Angelo Secchi of the Observatory of Roman Collegium in Rome . </P>
where do spicules tend to occur on the sun
where do spicules tend to occur on the sun
the chromosphere
the chromosphere