The sun is a mass of incandescent gas, a gigantic nuclear furnace where hydrogen is converted into helium at a temperature of millions of degrees.
太陽は水素が何百万の程度の温度のヘリウムに変えられる白熱ガスの固まり、巨大な核炉である。
As for the sun the lump of the incandescence gas where it can change into the helium of some 1,000,000 temperature hydrogen, it is the enormous nuclear furnace.