GENERAL KNOWLEDGE

Detailed explanation-1: -The centremost region of the Sun is known as the core; this is the region where Hydrogen turns into Helium through the nuclear fusion reaction. With temperatures believed to be reaching more than 15 million degrees Celsius, the core is considered to be the hottest region of the Sun.

Detailed explanation-2: -The primary contributors to heat in the core are the decay of radioactive elements, leftover heat from planetary formation, and heat released as the liquid outer core solidifies near its boundary with the inner core.

Detailed explanation-3: -Within Earth’s atmosphere, temperatures drop with increasing altitude. On the Sun however, the reverse occurs: its outermost layer, the corona, is nearly 500 times hotter than the underlying layer, the photosphere.