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Noun
1. meteoroidAstronomy
Wikipedia definition
2. MeteoroidA meteoroid is a sand- to boulder-sized particle of debris in the Solar System. The visible path of a meteoroid that enters Earth's (or another body's) atmosphere is called a meteor, or colloquially a shooting star or falling star. If a meteoroid reaches the ground and survives impact, then it is called a meteorite. Many meteors appearing seconds or minutes apart are called a meteor shower. The root word meteor comes from the Greek meteōros, meaning "high in the air".
Read “Meteoroid” on English Wikipedia
Read “流星物質” on Japanese Wikipedia
Read “Meteoroid” on DBpedia

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