Astronomy › lesson 13 of 100 · Beginner

Comets and Meteors

Comets and meteors are icy and rocky space debris.

The Halley's Comet, which was visible from Earth in 1986, is a well-known example of a comet that is made up of icy and rocky particles. This composition is typical of comets and meteors, which are formed from the leftover material from the formation of our Solar System.

These icy and rocky space debris can originate from various sources, including the outer Solar System and other celestial bodies. Comets, in particular, are thought to originate from a region known as the Oort Cloud, a distant, spherical shell of icy bodies surrounding our Solar System.

Meteors, on the other hand, are smaller particles that enter Earth's atmosphere and burn up, producing a bright streak of light in the sky, commonly known as a shooting star.

例

• Halley's CometA well-known comet that is made up of icy and rocky particles
• The Leonid meteor showerA annual meteor shower that occurs when the Earth passes through the trail of debris left behind by the Comet Tempel-Tuttle
• The Kuiper BeltA region of the outer Solar System that contains many small, icy bodies and other celestial objects

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