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The boundary between the mesosphere and the thermosphere is known as the mesopause.
The study of celestial objects, such as stars and galaxies, is known as astronomy.
The philosopher was known as an iconoclast for his relentless criticism of traditional religious beliefs and social norms.
The fifteenth of March is famously known as the Ides of March in Roman history.
The Republic of Ireland is officially known as Éire in Irish.
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