Antoniadi , Eugène Michael


Antoniadi , Eugène Michael
(1870–1944) Greek–French astronomer
Antoniadi was born in Constantinople (now Istanbul, Turkey). He established quite early a reputation as a brilliant observer and in 1893 was invited by Camille Flammarion to work at his observatory at Juvisy near Paris. From 1909 he worked mainly with the 33-inch (84-cm) refracting telescope at the observatory at Meudon. He became a French citizen in 1928.
In his two works La Planète Mars (1930) and La Planète Mercure (1934), Antoniadi published the results of many years' observations and presented the best maps of Mars and Mercury to appear until the space probes of recent times. With regard to Mars he took the strong line: “Nobody has ever seen a genuine canal on Mars,” attributing the “completely illusory canals,” seen by astronomers such as Percival Lowell and Flammarion, to irregular natural features of the Martian surface. Antoniadi also observed the great Martian storms of 1909, 1911, and 1924 noting after the last one, that the planet had become covered with yellow clouds and presented a color similar to Jupiter.
On Mercury his observations made between 1914 and 1929 seemed to confirm Giovanni Schiaparelli's rotation period of 88 days, identical with the planet's period of revolution around the Sun. The effect of this would be for Mercury always to turn the same face to the Sun, in the same way as the Moon always turns the same face to the Earth. Antoniadi cited nearly 300 observations of identifiable features always in the same position, as required by the 88-day rotation period.
However radar studies of Mercury in 1965 revealed a 59-day rotation period for Mercury. This time is however very close to half the synodic period of Mercury (116 days) so that when the planet returns to the same favorable viewing position in the sky, at intervals of 116 days, it does present the same face to observers.
Antoniadi also wrote on the history of astronomy, publishingL'Astronomie Égyptienne in 1934.

Scientists. . 2011.

Look at other dictionaries:

  • Eugene Antoniadi — Eugène Antoniadi Eugène Antoniadi. Eugène Michel Antoniadi (1er mars 1870 10 février 1944) était un astronome grec, né à Constantinople, qui passa l essentiel de sa vie en France. Il est aussi appelé Eugenios Antoniadis. Son nom e …   Wikipédia en Français

  • Eugène Antoniadi — Eugène Antoniadi. Eugène Michel Antoniadi (1er mars 1870 10 février 1944) était un astronome grec, né à Constantinople, qui passa l essentiel de sa vie en France. Il est aussi appelé Eugenios Antoniadis. Son nom est parfois cité comme …   Wikipédia en Français

  • Eugène Michel Antoniadi — (March 1 1870 ndash; February 10 1944) was a Greek astronomer, born in Asia Minor, who spent most of his life in France. He was also known as Eugenios Antoniadis. His name is also sometimes given as Eugène Michael Antoniadi or even incorrectly… …   Wikipedia

  • Eugène Michel Antoniadi — (griechisch Ευγένιος Μιχαήλ Αντωνιάδης, * 10. März 1870 in Konstantinopel; † 10. Februar 1944 in Paris), auch Eugène Michael Antoniadi oder Eugenios Antoniadi, war ein in der Türkei …   Deutsch Wikipedia

  • Eugène Antoniadi — Eugène Michel Antoniadi (* 10. März 1870 in Konstantinopel; † 10. Februar 1944 in Paris), auch Eugène Michael Antoniadi oder Eugenios Antoniadi, war ein in der Türkei geborener griechischer Astronom, der die meiste Zeit seines Lebens in… …   Deutsch Wikipedia

  • Antoniadi — Eugène Michel Antoniadi (* 10. März 1870 in Konstantinopel; † 10. Februar 1944 in Paris), auch Eugène Michael Antoniadi oder Eugenios Antoniadi, war ein in der Türkei geborener griechischer Astronom, der die meiste Zeit seines Lebens in… …   Deutsch Wikipedia

  • Eugenios Antoniadi — Eugène Michel Antoniadi (* 10. März 1870 in Konstantinopel; † 10. Februar 1944 in Paris), auch Eugène Michael Antoniadi oder Eugenios Antoniadi, war ein in der Türkei geborener griechischer Astronom, der die meiste Zeit seines Lebens in… …   Deutsch Wikipedia

  • Liste der Biografien/Ant–Anz — Biografien: A B C D E F G H I J K L M N O P Q …   Deutsch Wikipedia

  • Mercury (planet) — Mercury  ☿ …   Wikipedia

  • Liste der Astronomen — Astronomen mit Artikeln auf Wikipedia: A Cleveland Abbe (USA, 1838–1916) Charles Greeley Abbot (USA, 1872–1973) bestimmte erstmals die Solarkonstante Antonio Abetti (Italien, 1846–1928) Giorgio Abetti (Italien, 1882–1982) leitete zwei… …   Deutsch Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.