Final answer:
The core of the Sun is significantly hotter than its surface, with a temperature of about 15 million K compared to the photosphere's average of 5800 K.
Step-by-step explanation:
The question relates to the solar structure and how the temperature of the Sun's core compares to its surface. The temperature at the center, or core, of the Sun is the highest within the celestial body, estimated to be around 15 million Kelvin (K). This is due to the nuclear reactions taking place that generate the Sun's energy. As we move outward from the core through the Sun's layers, the temperature decreases until reaching the surface. The surface temperature of the Sun, known as the photosphere, averages about 5800 K. This means that the Sun's core is significantly hotter than the surface. An additional detail worth noting is that above the photosphere, in regions such as the chromosphere and corona, temperatures rise again due to magnetic effects, even though they are not hotter than the core.