Image:RoemerFig.jpg

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Summary

This graphic, from the original description (1676) of Roemer's observations, shows the typical configuration of the planets Earth (E,F(not shown),G,H,L,K) and Jupiter (B), with respect to the Sun (A), and the satellite Io (D,C) entering/leaving Jupiter's shadow. On FG Earth is approaching Jupiter, while on LK it is receding. There is also a motion of Jupiter to be accounted for in the detailed analysis, but it is relatively slow, compared to the speed of Earth in its orbit.

Licensing

Public license
This image is in the public domain because its copyright has expired in the United States and those countries with a copyright term of life of the author plus 100 years or less.

File history

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  • (del) (cur) 01:27, 27 January 2007 . . Glj1952 ( Talk | contribs) . . 436×825 (47,372 bytes) (== Summary == A diagram of Jupiter (B) eclipsing its moon Io (DC) as viewed from different points in earth's orbit around the sun. From Olaf (Ole) Roemer, "Demonstration tovchant le mouvement de la lumiere trouvé par M. Römer de l' Academie Royale des S)
  • (del) (rev) 19:53, 26 August 2006 . . Ulcph ( Talk | contribs) . . 222×426 (15,373 bytes) (This graphic, from the original description (1676) of Roemer's observations, shows the typical configuration of the planets Earth (E,F(not shown),G,H,L,K) and Jupiter (B), with respect to the Sun (A), and the satellite Io (D,C) entering/leaving Jupiter's )

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