File:Rømer original.jpg

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Description
English: A diagram illustrating Rømer's determination of the speed of light.
A: The Sun
B: Jupiter
C: immersion of Io into Jupiter's shadow at the start of an eclipse
D: emergence of Io from Jupiter's shadow at the end of an eclipse
E–H, K, L: positions of Earth at different dates (illustrative)
E: point of conjunction
H: point of opposition
Date
Source Journal de sçavans, 7 December 1676; from this scan
Author Anonymous, based on a work by Ole Rømer (1644–1710)
Other versions File:Roemer.jpg

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current14:10, 1 November 2009Thumbnail for version as of 14:10, 1 November 2009521 × 925 (48 KB)Physchim62 (talk | contribs){{Information |Description={{en|1=A diagram illustrating w:Rømer's determination of the speed of light. :'''A''': The w:Sun :'''B''': w:Jupiter :'''C''': immersion of Io into Jupiter's shadow at the start of an [[w:eclipse|

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