  The global oscillations of the Sun are investigated on the base of three
independent sets of data: 1. Records of Total Solar Irradiance (TSI). 2. The
average brightness of the photosphere in MDI (SOHO) and HMI (SDO) images. 3.
Records of the time variations of sunlight reflected from the planets during
their passage in the field of view of the LASCO C3 coronagraph. It is found
that in the low-frequency spectrum of solar oscillations as a star there are
modes of 8-10, 36-38 hours and the main stable 9-day mode. The last mode can be
regarded as a reflection of oscillatory processes near the fast rotating core
of the Sun according to Fossat et al. (2017).
