Glossary term: 望遠鏡
Description: 望遠鏡是一種收集遙遠物體的光子（可見光或其他波段）並向觀察者提供有關信息（如圖像）的裝置。早期的望遠鏡（從 17 世紀初開始）使用透鏡作為光學元件（如折射望遠鏡）。透鏡的製作尺寸有上限，因此為了用更大的望遠鏡更細緻地觀察較暗的物體，人們改用鏡子（見反射望遠鏡）來聚焦光線。最大的光學望遠鏡就是反射望遠鏡。在20 世紀，人們發明瞭研究電磁波譜其他波段的望遠鏡，因此現在有了射電望遠鏡、紅外望遠鏡、X 射線望遠鏡等。由於天體很闇弱，天文學家傾向於建造大口徑望遠鏡，以收集更多光線，達到更精細的角分辨率。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
This is an automated transliteration of the simplified Chinese translation of this term
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