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本節目提到，人類從古至今對銀河系的好奇與探索，從肉眼觀察到望遠鏡下的真實面貌，發現它是一個直徑約15萬光年、擁有數千億顆恆星的棒旋星系，太陽系僅是其外圍的一部分。文章不僅解釋了光年這一巨大尺度單位，還透過形象的比喻展現了恆星數量的浩瀚，並闡述了人類對銀河系在宇宙中地位認知的演變，從誤認為它是整個宇宙，到理解它僅是無數星系中的一員。此外，節目也補充了銀河系的棒狀結構、質量、中心黑洞、自轉以及宜居帶等豐富細節，強調了銀河系的壯麗與複雜性，並展望了未來天文學的進步將帶來的更深入認識。 --- 科學好好聽有家了，到FB粉絲專頁按讚支持我們 https://www.facebook.com/share/1EjbtAWU3L/ -- Hosting provided by SoundOn
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