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- Édouard_Stephan abstract "Édouard Jean-Marie Stephan (31 August 1837 – 31 December 1923) was a French astronomer. His surname is sometimes spelled Stéphan in some literature, but this is apparently erroneous.He was born in St Pezenne and attended the Ecole Normale Superieur, and graduated at the top of his class in 1862.He was the director of the Marseille Observatory from 1864 to 1907 (until 1872 he was subordinate to Urbain le Verrier). In the early part of his career there, he had limited opportunities to do observations because he was preoccupied with improving the observatory. He discovered the asteroid 89 Julia in 1866. In 1867 he used the new telescope to observe a transit of Mercury.Between 1870 and 1875, Stephan systematically studied nebulae, precisely recording their positions and discovering many new ones. His goal was to enable the exact measurement of stellar proper motions by creating a reference system of fixed objects.In 1873, Stephan was the first person to attempt to measure the angular diameter of a star using interferometry, converting the 80 cm telescope at Marseille Observatory into an interferometer. He did this by obscuring the reflector with a mask containing two vertical slits.The star he chose to perform this experiment was Sirius. He did not succeed in resolving any stellar disks, but by 1874 had obtained an upper limit to stellar diameters of 0.158".He discovered the galaxy NGC 6027 in 1882 using the 80 cm reflector.Among others, he discovered Stephan's Quintet, also known as "Arp 319", a group of five galaxies. Stephan made this discovery with the first telescope equipped with a reflection coated mirror.In 1884 the French Academy of Sciences awarded him the prix Valz. His name is associated with the periodic comet 38P/Stephan-Oterma, although Jérôme Coggia saw it first.".
- Édouard_Stephan birthDate "1837-08-31".
- Édouard_Stephan deathDate "1923-12-31".
- Édouard_Stephan thumbnail Édouard_Jean-Marie_Stephan.jpg?width=300.
- Édouard_Stephan wikiPageID "593405".
- Édouard_Stephan wikiPageRevisionID "598483218".
- Édouard_Stephan dateOfBirth "1837-08-31".
- Édouard_Stephan dateOfDeath "1923-12-31".
- Édouard_Stephan name "Stephan, Edouard".
- Édouard_Stephan shortDescription "french astronomer".
- Édouard_Stephan description "french astronomer".
- Édouard_Stephan subject Category:1837_births.
- Édouard_Stephan subject Category:1923_deaths.
- Édouard_Stephan subject Category:Discoverers_of_asteroids.
- Édouard_Stephan subject Category:French_astronomers.
- Édouard_Stephan type Agent.
- Édouard_Stephan type Person.
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- Édouard_Stephan comment "Édouard Jean-Marie Stephan (31 August 1837 – 31 December 1923) was a French astronomer. His surname is sometimes spelled Stéphan in some literature, but this is apparently erroneous.He was born in St Pezenne and attended the Ecole Normale Superieur, and graduated at the top of his class in 1862.He was the director of the Marseille Observatory from 1864 to 1907 (until 1872 he was subordinate to Urbain le Verrier).".
- Édouard_Stephan label "Édouard Jean-Marie Stephan".
- Édouard_Stephan label "Édouard Jean-Marie Stephan".
- Édouard_Stephan label "Édouard Jean-Marie Stephan".
- Édouard_Stephan label "Édouard Jean-Marie Stephan".
- Édouard_Stephan label "Édouard Stephan".
- Édouard_Stephan label "Édouard Stephan".
- Édouard_Stephan label "Édouard Stephan".
- Édouard_Stephan label "Édouard Stephan".
- Édouard_Stephan label "Стефан, Жан Мари Эдуард".
- Édouard_Stephan label "エドゥアール・ステファン".
- Édouard_Stephan label "讓·瑪璉·愛德華·史提芬".
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- Édouard_Stephan sameAs エドゥアール・ステファン.
- Édouard_Stephan sameAs Édouard_Jean-Marie_Stephan.
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- Édouard_Stephan sameAs Q274349.
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- Édouard_Stephan wasDerivedFrom Édouard_Stephan?oldid=598483218.
- Édouard_Stephan depiction Édouard_Jean-Marie_Stephan.jpg.
- Édouard_Stephan givenName "Edouard".
- Édouard_Stephan name "Edouard Stephan".
- Édouard_Stephan surname "Stephan".