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DescriptionOle Rømer - Obser. Primi Jovialium Parisiis - pp1+4.jpg
English: Page 1 (right) and 4 of the list of eclipses of the Jupiter moon Io that formed the basis of Ole Rømer's discovery of the finite speed of light.
The Latin title Obser. Primi Jovialium Parisiis translates to "Observations of the first Jupiter moon in Paris". Page 1 lists emersions and immersions of Io observed between 1668 and 1678. The first observation (circled) is marked "should according to everyone's opinion be excluded".
The top of page 4 lists observations of the fourth moon of Jupiter (Callisto). At the lower half are a couple of attempts to match the number of revolutions ("Rev.") of Io with an average orbiting time for three periods, 76-77, 71-72 and 72-73. Next to them are what according to Meyer p. 19 appears to calculations of an average value of the time it takes light to travel a distance equal to the Earth orbit radius (ca. 11 minutes). At the bottom, written upside down, are calculations of eclipses in Paris based on observed eclipses at Uranienborg.
Dansk: Side 1 (til højre) og 4 af listen over formørkelser af Jupitermånen Io, der dannede grundlaget for Ole Rømers opdagelse af lysets tøven.
Den latinske titel Obser. Primi Jovialium Parisiis kan oversættes til "Observationer af den første Jupitermåne i Paris". Side 1 er en liste over emersioner og immersioner af Io observeret mellem 1668 og 1678. Den første obersvation (indcirklet) er mærket med "bør efter alles mening ekskluderes".
Toppen af side 4 består af observationer af Jupiters fjerde måne. På den nederste halvdel er forsøg på at matche antallet af omløb ("Rev.") af Io med en gennemsnitsomløbstid for tre perioder, 76-77, 71-72 and 72-73. Ved siden af, er ifølge Meyer s. 19 tilsyneladende beregninger af en gennemsnitsværdi af den tid, det tager lyset at gennemløbe en afstand lig jordbanens radius (cirka 11 minutter). Nederst, skrevet på hovedet, er beregninger af formørkelser i Paris baseret på observerede formørkelser i Uranienborg.
Date
années 1670
date QS:P,+1670-00-00T00:00:00Z/8
(first publication in 1915)
Source
Meyer, Kirstine (1915) Om Ole Rømers Opdagelse af Lysets Tøven, Det Kongelige Danske Videnskabernes Selskabs Skrifter, 7. Række, naturvidenskabelig og mathematisk Afdeling, XII. 3, København. Own scan.
Ole Christensen Romer; Ole Christensen Roemer; Ole Christensen Roëmer; Oläus Römer; Ole Rømer
Description
astronome, physicien ou physicienne, mathématicien ou mathématicienne, professeur ou professeure d'université, juge et inventeur ou inventrice d'un brevet danois
The original work is in the public domain by age. If the 1915 reproduction is photographic, it is still public domain because it does not meet the threshold of originality and it was created before 1970.
Autres versions
Pages 2 and 3:
Conditions d’utilisation
Public domainPublic domainfalsefalse
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https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
Public domainPublic domainfalsefalse
This image is in the public domain in Denmark because the DanishConsolidated Act on Copyright of 2010 specifies (§91, 5) that all photographic images not considered to be "photographic works" that were created before 1 January 1970 are exempt from protection (details).
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{{Information |Description={{en|Page 1 (right) and 4 of the list of eclipses of the Jupiter moon Io that formed the basis of Ole Rømer's discovery of the finite speed of light. The Latin title ''Obser. Primi Jovialium Parisiis'' translates to "Observati