​LightningV/s Sun's surface: Which is hotter?​

When we imagine an area of extreme heat that exists in this world, the Sun probably tops the list. After all, it helps in the existence of our planet, scorches deserts, and lights up our days with relentless energy.

But what if there’s something on Earth that’s even hotter than the Sun’s surface? It’s true and happens more often than not!

Lightning, the dazzling streak of electricity that crackles through the sky during storms, can actually reach temperatures far greater than the visible surface of the Sun.

While this might just seem made up, it's actually backed by science. Lightning’s power lies not in how long it lasts, but in the intensity of energy contained in its single strike happening within a split second.

Lightning can reach temperatures up to 30,000°C, which is nearly five times hotter than the Sun’s surface. To compare, the Sun’s photosphere, or the part which is visible to the human eye, measures around 5,500°C. This might seem impossible, but lightning’s secret lies in its high concentration of energy over a tiny space and brief time. The bolt rapidly heats the surrounding air, causing an explosive expansion we hear as thunder.

Lightning gets so hot because of how energy moves during a storm. When electrical charges build up in a cloud and on the ground, they release in one sudden burst; this is known as lightning. As that powerful electrical current travels through the air, the air pushes back, creating resistance.

That resistance causes the air to heat up really fast, going to temperatures hotter than the surface of the sun! Its mechanism is similar to forcing too much energy through a narrow wire, so it heats up in a flash. That makes lightning so surprisingly powerful and super hot.

Despite lightning’s extreme temperature, we don’t feel the full burn because it is very brief. A lightning strike lasts just a few milliseconds, which is too short to transfer all that heat to the environment. Still, it’s powerful enough to melt metal, break trees, or cause fires. What we experience instead is the thunder, which is caused as a result of the superheated air expanding rapidly.