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In General

• What was the Tunguska event?
• What type of meteoroid impacts are astronomers most concerned about?
• Where did all the water on Earth come from?
• What is a meteoroid?
• Does any meteoroid ever enter the Earth's atmosphere?
• What is a meteorite?
• What is a meteor?
• What is the difference between meteoroids and meteorites?
• Why is Antarctica a good place to look for meteorites?
• Why are some meteorites made of different material than others?
• Do any of the meteorites we find on Earth come from another planet?
• What kind of material from space arrives on Earth?

Meteors

• What are the small meteoroids that cause shooting stars remnants of?
• What causes a shooting star?
• What causes a meteor shower?
• What is the source of the annual meteor shower known as the Leonids?