Quo Fuit places 4 dated presences for Pierre Janssen across 4 places, from 1853 to 1907.
Each one keeps the sentence it was taken from and a link to its source.
Pierre Jules César Janssen (22 February 1824 – 23 December 1907), usually known as Jules Janssen, was a French astronomer who, along with English scientist Joseph Norman Lockyer, is credited with discovering the gaseous nature of the solar chromosphere, and with some justification the element helium.Wikipedia, full article · CC BY-SA
Every dot is a place Pierre Janssen is documented in, on a dated record. The interactive globe carries the full detail.
Where Pierre Janssen was documented, and when
1853 to 1871period
Lycée Charlemagneattested“He taught at the Lycée Charlemagne in 1853, and in the school of architecture 1865 – 1871, but his energies were mainly devoted to various scientific missions entrusted to him.”source: Wikipedia: Pierre Janssen
23 December 1907exact date
Parisattested“Janssen died at Meudon on 23 December 1907 and was buried at Père Lachaise Cemetery in Paris, with the name "J.”source: Wikipedia: Pierre Janssen
23 December 1907exact date
Meudonattested“Janssen died at Meudon on 23 December 1907 and was buried at Père Lachaise Cemetery in Paris, with the name "J.”source: Wikipedia: Pierre Janssen
23 December 1907exact date
Père Lachaise Cemeteryattested“Janssen died at Meudon on 23 December 1907 and was buried at Père Lachaise Cemetery in Paris, with the name "J.”source: Wikipedia: Pierre Janssen
Open Quo Fuit to see these 4 presences on the
globe, filter them by date, and follow the journey year by year.
In each of these, a source puts Pierre Janssen and the place in the same dated sentence without stating
that Pierre Janssen was there. They are kept apart from the timeline above for exactly that reason:
a mention is not a presence, and Quo Fuit does not quietly promote one into the other.
1857 to 1882period
Oranmentioned“Thus in 1857 he went to Peru in order to determine the magnetic equator; in 1861–1862 and 1864, he studied telluric absorption in the solar spectrum in Italy and Switzerland; in 1867 he carried out optical and magnetic experiments at the…”source: Wikipedia: Pierre Janssen
1857 to 1882period
Perumentioned“Thus in 1857 he went to Peru in order to determine the magnetic equator; in 1861–1862 and 1864, he studied telluric absorption in the solar spectrum in Italy and Switzerland; in 1867 he carried out optical and magnetic experiments at the…”source: Wikipedia: Pierre Janssen
1857 to 1882period
Italymentioned“Thus in 1857 he went to Peru in order to determine the magnetic equator; in 1861–1862 and 1864, he studied telluric absorption in the solar spectrum in Italy and Switzerland; in 1867 he carried out optical and magnetic experiments at the…”source: Wikipedia: Pierre Janssen
1857 to 1882period
Azoresmentioned“Thus in 1857 he went to Peru in order to determine the magnetic equator; in 1861–1862 and 1864, he studied telluric absorption in the solar spectrum in Italy and Switzerland; in 1867 he carried out optical and magnetic experiments at the…”source: Wikipedia: Pierre Janssen
1857 to 1882period
Japanmentioned“Thus in 1857 he went to Peru in order to determine the magnetic equator; in 1861–1862 and 1864, he studied telluric absorption in the solar spectrum in Italy and Switzerland; in 1867 he carried out optical and magnetic experiments at the…”source: Wikipedia: Pierre Janssen
1857 to 1882period
Algeriamentioned“Thus in 1857 he went to Peru in order to determine the magnetic equator; in 1861–1862 and 1864, he studied telluric absorption in the solar spectrum in Italy and Switzerland; in 1867 he carried out optical and magnetic experiments at the…”source: Wikipedia: Pierre Janssen
1867 to 1905period
Trani, Apuliamentioned“to Trani, Italy (1867), Guntur, India (1868), Algiers (1870), Siam (1875), the Caroline Islands (1883), and to Alcossebre in Spain (1905).”source: Wikipedia: Pierre Janssen
1867 to 1905period
Alcossebrementioned“to Trani, Italy (1867), Guntur, India (1868), Algiers (1870), Siam (1875), the Caroline Islands (1883), and to Alcossebre in Spain (1905).”source: Wikipedia: Pierre Janssen
1867 to 1905period
Spainmentioned“to Trani, Italy (1867), Guntur, India (1868), Algiers (1870), Siam (1875), the Caroline Islands (1883), and to Alcossebre in Spain (1905).”source: Wikipedia: Pierre Janssen
18 August 1868exact date
Gunturmentioned“While observing the solar eclipse of 18 August 1868, at Guntur, Madras State (now in Andhra Pradesh), British India, he noticed bright lines in the spectrum of the chromosphere, showing that the chromosphere is gaseous.”source: Wikipedia: Pierre Janssen
18 August 1868exact date
Andhra Pradeshmentioned“While observing the solar eclipse of 18 August 1868, at Guntur, Madras State (now in Andhra Pradesh), British India, he noticed bright lines in the spectrum of the chromosphere, showing that the chromosphere is gaseous.”source: Wikipedia: Pierre Janssen
1875year
Meudonmentioned“In 1875, Janssen was appointed director of the new astrophysical observatory established by the French government at Meudon, and set foot on there in 1876 the remarkable series of solar photographs collected in his great Atlas de photogr…”source: Wikipedia: Pierre Janssen
Two people documented in the same place in the same year is a correlation, not a meeting.
Quo Fuit will never say they met without a source that says so.
How to read this page
Every line above is a dated fact taken from a source, with the sentence it came from and a link
back to it. Nothing is inferred, and a gap in the record is not evidence that someone was elsewhere.
A tag says how the fact is carried by its source: documented a structured,
explicitly dated record, attested a sentence that states the person was there,
mentioned a sentence that ties the person to the place without stating presence.
Sentences quoted from Wikipedia are available under CC BY-SA 4.0. Public domain books come from
Project Gutenberg. Quo Fuit claims no rights over these sources.
See Pierre Janssen on a 3D globe, filter the record by date, and cross this life with another to find
where the two overlap.
