What Is a Shooting Star?

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A shooting star is a brief streak of light in the night sky made when a small piece of space rock or dust enters Earth's atmosphere and burns up. Despite the name, it is not a star at all. A real star, like our Sun, is an enormous ball of burning gas that stays in place and shines for billions of years. A shooting star lasts only a second or two.

The glowing streak happens because the rock travels extremely fast β€” about 50 kilometres a second β€” and rubs against the air. This friction heats it until it burns and glows brightly. Scientists give the rock three names along its journey: it is a meteoroid in space, a meteor while it glows in the air, and a meteorite only if a leftover piece reaches the ground.

Most are smaller than a pea and burn up completely before landing. On most nights you might spot one or two, but during a meteor shower β€” when Earth passes through the dusty trail of a comet β€” many can streak across the sky in a single night.

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Frequently asked questions

Is a shooting star really a star?
No. A shooting star is a small piece of space rock or dust burning up as it speeds through Earth's atmosphere. A real star is a giant ball of glowing gas, like our Sun, that shines for billions of years.
Why do shooting stars glow?
The space rock moves so fast β€” around 50 kilometres a second β€” that it rubs hard against the air. The friction heats it until it burns and glows, leaving a bright streak of light.
What is the difference between a meteoroid, a meteor and a meteorite?
A meteoroid is the rock while it is still in space. It is called a meteor when it glows in the air. If a leftover piece survives the fall and lands on the ground, it becomes a meteorite.
What is a meteor shower?
A meteor shower happens when Earth passes through the trail of dust left behind by a comet. Many shooting stars can appear in one night instead of just the usual one or two.
How big is a shooting star?
Most are tiny β€” smaller than a pea. They usually burn up completely high in the atmosphere and never reach the ground.

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