Why do meteors glow in the sky?

What produces the light?

A meteoroid enters the atmosphere at speeds of many kilometers per second. It compresses the air ahead of it, generating intense heat. Hot surrounding gases glow, while the object's outer layers may melt and vaporize in a process called ablation. The full physics also involves collisions with atmospheric particles, so 'friction' alone is an oversimplified explanation.

Meteoroid, meteor or meteorite?

A meteoroid is the small rocky or metallic body in space. A meteor is the visible phenomenon during atmospheric entry. If a fragment survives and reaches the ground, that remaining piece is a meteorite. Not every meteoroid survives the passage.

Does a meteorite hit the ground red-hot?

Not necessarily. For many small fragments, the most intense heating ends high in the atmosphere. During the remaining dark flight, the fragment slows and cools. Avoid assuming every newly fallen meteorite is still burning hot.

Watch the 41-second explainer

See our short science explanation of meteor heating and atmospheric entry. The article adds definitions and caveats that may not fit within one Short.

Further reading & sources

• NASA Science — The Solar System: meteoroids, meteors, meteorites
• NASA/JPL CNEOS — Fireballs and atmospheric entry
• NASA — What happens during a meteorite's dark flight?

This article is educational, not a substitute for primary scientific literature. Scientific claims and examples may be refined as evidence improves.