ocr: VIRGO The Sun is hotter at the fransi- tion zone than expected. In this picture in red coloured layers, sound travels faster than predicted by the theories, implying that the remperature is higher than expected. The conspicuous red layer, abouta third of the way down from the surface to the Sun's centre, suggests unexpectedly high remperatures at the transition zone between the turbulent outer region convection zone) and more stable region inside it (radiation zone). The Sun's core seems to be cooler than expected. In blue coloured Jayers the sound speed is lower than expected, and tempera- tu ...
