Question

What is the temperature of the Sun's core? How do astronomers determine this temperature? How accurate is the figure?

Answer 1

according to research TV India the sun's core temperature was 1 caror kelvin

Answer 2

Temperature of Sun;s core is estimated to be 15 million degree C.

Mostly theoretical calculations of fusion core pressure etc.with available data such as surface temperature which can be measured remotely.

Hope it helps you