Here's why:

* Sun's Core: The Sun's core reaches temperatures of around 15 million degrees Celsius (27 million degrees Fahrenheit). This extreme heat is generated by nuclear fusion, where hydrogen atoms fuse to form helium, releasing tremendous energy.

* Earth's Core: The Earth's core is much cooler, with temperatures estimated to be around 5,200 degrees Celsius (9,392 degrees Fahrenheit). This heat is primarily generated from the decay of radioactive elements within the Earth.

While the Earth's core is incredibly hot, it's nowhere near the scorching temperatures found in the Sun's core.