ORGANIZATION@1 has a very hot interior , reaching NUMBER@1 ° C at the core , and it radiates NUMBER@2 times more energy into space than it receives from the Sun .

It has a small rocky core at its centre and it is very hot ; its temperature reaches NUMBER@3 K -LRB- NUMBER@4 ° F , NUMBER@5 ° C -RRB- . It is so hot that it radiates about two and a half times more heat energy into space than the amount of energy ORGANIZATION@1 receives from the Sun .
