Why does the sun look so bright?
Sun's Bright Secret
Why does the sun look so bright?
You squint up at the sky and wonder: why is the sun so impossibly bright? Bright enough to light up the whole world, bright enough to make you look away. What makes it shine like that?
The sun is bright because it's on fire — but not the kind of fire you know. No wood burning, no match struck. The sun runs on something way more powerful: it's crushing hydrogen atoms together so hard they fuse into helium, and that releases massive amounts of energy. This process is called fusion, and it's like smashing two tiny magnets together until they explode into light and heat.
