Light. Light is the most powerfull source of light. It brights are world. The most powerfull thing is the SUN the sun is made out of lava fire and more hot things. The temputrue at the sun is 5,778 K! The average temperature on Earth is about 61 degrees F (16 C). Cant you see the difference? Light travels through the earth. A team of scientists has measured the melting point of iron at high precision in a laboratory, and then drew from that result to calculate the temperature at the boundary of Earth’s inner and outer core — now estimated at 6,000 C(about 10,800 F). That’s as hot as the surface of the sun. Comment bellow if you see the diffrence.