Are shooting stars really falling stars?

KohakuWhen you saw a shooting star, did you ever think a star was really falling?

The answer in 30 seconds

Let me first tell you what shooting stars really are, in 30 seconds.

Shooting stars are not stars falling from the sky. They are tiny bits of dust drifting through space that plunge into Earth's atmosphere at tremendous speed and glow high in the sky. They glow at a height of roughly 120 km to 80 km, and most of the dust vaporizes before it reaches the ground.

A thin streak of light from a shooting star running diagonally across the upper right of a starry sky, with silhouettes of trees in front — The thin streak of light in the upper right is a shooting star from the Perseid meteor shower.Photo: Martin Mark / CC BY-SA 4.0 / Wikimedia Commons

Shooting stars start as tiny pieces

The stars shining in the night sky and shooting stars are completely different things. A shooting star starts out as a small piece of rock or ice in space. They range in size from a grain of sand to a large boulder, and while they are in space they are called "meteoroids".

So fast they glow high in the sky

Meteoroids rush into Earth's atmosphere at speeds from several tens of km per second up to about 70 km per second. Because they are so fast, the air in front of them is squeezed hard and becomes very hot, and the dust vaporizes. At that moment, the vaporized dust and the gases in the surrounding air give off light. This is a shooting star (a meteor). They usually glow at a height of about 120 km to 80 km.

KohakuPlunging in at tens of kilometers per second. Just imagining it makes my head spin!

Names that change with location

The same object gets a different name depending on where it is. In space, it is a meteoroid. When it glows in the atmosphere, it is a meteor. If it does not burn up and reaches the ground, it is a meteorite. A very bright shooting star is called a fireball, and sometimes a meteorite falls to the ground after a fireball.

Figure: Names that change with location

Falling on Earth every day

According to NASA (the U.S. National Aeronautics and Space Administration), about 44 tons of space dust and other material is thought to fall on Earth every day, and most of it vaporizes in the atmosphere. Even on an ordinary night, you can see a few shooting stars an hour, and when Earth passes through a trail of dust left behind by a comet, the number jumps up in what is called a meteor shower.

Want to know more?

The color of a shooting star depends on the combination of light given off by substances in the dust, such as sodium, iron and magnesium, and by nitrogen and oxygen in the air.
A shooting star can leave behind a faintly glowing trail called a "meteor train", which can last from a few seconds to more than 10 minutes.
The shooting stars of the Perseid meteor shower, seen every August, are dust from Comet Swift-Tuttle, which comes close to the sun about every 135 years.

KohakuA shooting star is tiny space dust glowing as it plunges into the atmosphere. The stars in the night sky are not falling at all.

Quick quiz: test yourself

What is a shooting star really?

Show the answer

A star falling from the sky
Space dust glowing in the air
Light left over from lightning

Space dust glowing in the air Tiny bits of space dust plunge into Earth's atmosphere at tremendous speed and glow high in the sky. Most vaporize before reaching the ground.

Sources

Meteors and MeteoritesNASA Science
流星天文学辞典（日本天文学会） (in Japanese)
I Didn't Know That!: Shooting StarsU.S. National Park Service

This article was written after checking the sources above as of 2026-10-03. Explanations may change as research progresses. Photo credits are shown below each photo.