Figure 16-29: R I V U X G
A Solar Prominence A huge prominence arches above the solar surface in this ultraviolet image from the SOHO spacecraft. The image was recorded using ultraviolet light at a wavelength of 30.4 nm, emitted by singly ionized helium atoms at a temperature of about 60,000 K. By comparison, the material within the arches in Figure 16-25 reaches temperatures in excess of 2 × 106 K.
(NASA)