What Is A Shooting Star?

QUICK ANSWER

A shooting star isn't actually a star. It's a small piece of rock or dust from space burning up as it enters Earth's atmosphere, creating a brief streak of light. The technical name is a meteor. Many meteors happen every day worldwide, with brighter ones appearing especially during meteor showers.

A shooting star is a small piece of rock or dust from space burning up in Earth's atmosphere. The technical name is meteor, and they're not stars at all. Meteors happen constantly worldwide, with many becoming visible during the night. The brightest ones, called fireballs, can be visible even during the day.

What is a shooting star really?

A meteor, which is a small object burning up in Earth's atmosphere. Meteoroids are bits of rock and dust orbiting the Sun, ranging from tiny grains to small boulders. When they hit Earth's atmosphere, friction with the air heats them to thousands of degrees, making them glow brightly as they burn up. The brief streak of light we see is the trail of vaporized rock and ionized air. Most meteoroids are tiny (smaller than a grain of sand) and vaporize completely in the atmosphere.

Where do they come from?

Mostly from comet debris and asteroids. As comets travel through the inner solar system, they shed dust and small particles that spread along their orbital path. When Earth passes through one of these debris streams, the result is a meteor shower with many meteors visible per hour. Larger meteoroids tend to come from asteroids, often broken off in collisions. About 100 tons of meteoroid material enters Earth's atmosphere every day, most of it dust-sized and never visible to anyone.

What are meteor showers?

Concentrated periods of meteor activity. When Earth passes through a comet's debris trail, the result is a meteor shower with dozens or hundreds of meteors per hour visible from dark locations. The Perseid shower in August (from Comet Swift-Tuttle), the Geminids in December (from asteroid 3200 Phaethon), and the Leonids in November (from Comet Tempel-Tuttle) are among the most popular annual showers. Some, like the 1833 Leonid storm, have produced thousands of meteors per hour, looking like rain falling from the sky.

Can shooting stars hit the ground?

Rarely, and then they're called meteorites. Most meteoroids vaporize completely in the atmosphere, but larger ones can survive the trip and land on Earth. Once it hits the ground, the rock is called a meteorite (different from meteor, which is the trail in the sky, and meteoroid, which is the rock in space). Meteorites are usually small, but occasional larger impacts can produce significant craters. The famous Barringer Crater in Arizona was created by a meteorite impact about 50,000 years ago.

A shooting star is a meteor, a small piece of rock or dust burning up in Earth's atmosphere. Not actually a star, but the name has stuck since long before we understood what they really were. Meteors happen constantly, with dramatic increases during annual meteor showers. The rare ones that survive to reach the ground are called meteorites. The phenomenon is one of the most common and dramatic things you can see in the night sky.

What Is A Shooting Star?