Sun appears to be oscillating at many frequencies

Last year Henry Hill and his collaborators reported seeing normal modes of oscillation in the Sun, with periods ranging from 6–70 minutes. By now the group says they have seen oscillations at a minimum of 20 different frequencies. Recently a group at the Crimean Astrophysical Observatory reported a period of 160 minutes, which was also observed by a group at the University of Birmingham, England (who also reported two shorter periods).