Early modern European · c. 1580–1600

Tycho Brahe's Mars observations

Observation logs from Uraniborg on Hven, published in Tychonis Brahe Dani Opera omnia, ed. J. L. E. Dreyer

Two decades of naked-eye positions of Mars, inherited by Kepler around 1600. They include observations of Mars at opposition, the middle of its retrograde arc, which Kepler used to derive its orbit. The logs themselves are raw positions, not a theory of retrogradation.

Author: Tycho Brahe
Date: c. 1580–1600
Original language: Latin
Kind: Observation record
Planets: Mars

On the shelf · Early modern and modern · 12−1800 → 2026

−1800−1500−1000−5001500100015002026

Span · c. 1580–1600Same shelfThis source’s span

Editions

One edition.

Year	Edition	©
1923	J. L. E. Dreyer (ed.), Tychonis Brahe Dani Opera omnia, 15 vols. (Copenhagen: Gyldendal, 1913–1929); the observations are in the Thesaurus Observationum, vols. I–IV = Opera omnia vols. X–XIII (Hauniae, 1923–1926)	PD

PD public domain

Read it

One digitised copy.

Opera omnia, ed. Dreyer, vol. X (Copenhagen, 1913)Internet ArchivePDOpen ↗

Copies stay with their holders; every link opens their site. Licence: PD public domain · CC BY · CC BY-SA · © rights reserved · ? not stated.

Myths we don’t repeat

Checked, and left out.

Myth 01
Not an established count: figures such as 'about a dozen oppositions, two of them Kepler's own' differ between secondary sources and are unconfirmed.

References

University of North Carolina, astronomy course lab notes on planetary motion

Also on the Early modern and modern shelf

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