Jules JanssenFrankrig, 1824–1907Zonnevlekken
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Ukendt
Rijksmuseum Amsterdam
Amsterdam, Holland
Ejeren er kendt; om værket er udstillet i dag, vides ikke.
- Kilde
- Museet
Oplysninger
- Inventarnummer
- RP-F-F25643-D-1
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Kilder
- Rijksmuseum Amsterdam
- Billede: Rijksmuseum Amsterdam — public domain
Imens i livet hos Jules Janssen
Hele livet9. juni 1872 – 26. juli 1883 · Medlemskab
Accademia Nazionale dei Lincei
1883
Eclipse expedition to the Caroline Islands
In 1883 a solar-eclipse expedition took Janssen to the Caroline Islands.
26. juli 1883 · Medlemskab
Accademia Nazionale dei Lincei
1884
The International Meridian Conference
In 1884 Janssen took part in the International Meridian Conference.
after 1885
Studies the oxygen spectrum under high pressure
After 1885 Janssen took up the absorption spectrum of oxygen at pressures above 50 atmospheres and found the conditions under which it becomes a banded spectrum.
6. juni 1887 – 31. december 1888
Post: president of the French Academy of Sciences
