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Consideratio & observatio cometae aetherei astronomica qui anno MDLXXX mensibus octobri, novembri et decembri in alto aethere apparvit : item descriptio terribilium aliquot & portensorum chasmatum quae his annis MDLXXX & MDLXXXI conspecta sunt
No prior complete English translation of this text has been found.
Extensive searches across multiple scholarly and library catalogs (including local catalogs, Google Books, and Internet Archive) yielded no evidence of an English translation of Michael Mästlin's 1581 work 'Consideratio & observatio cometae aetherei astronomica'. Given the specialized nature of this astronomical treatise, it is highly probable that no complete or partial English translation has been published.
Verified Apr 1, 2026 via local catalogs, open library, google books, internet archive, openalex · methodology
Michael Mästlin treats the 1580 comet not as a random atmospheric fire, but as a deliberate celestial messenger. Readers will follow his rigorous shift from ancient speculation to the precision of modern astronomical observation.