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	JANUS, in astronomy. The Columbia Encyclopedia: Sixth Edition. 2000 (Site not responding. Last check: 2007-10-10)
		Also known as Saturn X (or S10), Janus is an irregularly shaped (nonspherical) body measuring about 122 mi (196 km) by 119 mi (192 km) by 93 mi (150 km); it orbits Saturn at a mean distance of 94,120 mi (151,472 km), and has equal orbital and rotational periods of 0.6945 earth days.
		The French astronomer Audouin Dollfus is credited with the discovery of Janus in 1966.
		Janus and Epimetheus are co-orbital, that is, they share the same average orbit; about every fourth year—at closest approach—the lower, faster satellite overtakes the other, they exchange angular momentum, and the lower one is boosted into a higher orbit while the higher one drops to the lower orbit.
	www.bartleby.com /aol/65/ja/Janus-ast.html (169 words)

	Lake County Astronomical Society NightTimes
		Audouin Charles Dollfus, a French physicist and astronomer was born on November 12, 1924.
		Dollfus estimated that the atmospheric pressure at ground level was about 1 mm of mercury.
		In 1966 Dollfus discovered Janus, the innermost moon of Saturn, at a time when the rings to which it is very close were seen edge on from Earth (and practically invisible).
	www.bpccs.com /lcas/Articles/dollfus.htm (503 words)

	Janus (moon)
		Janus is a moon of Saturn discovered by the French astronomer Audouin Dollfus[?] in 1966.
		Dollfus is credited with the discovery of Janus but it's not really certain whether the object he saw was Janus or Epimetheus and his observations led to a spurious orbit (Walker[?] discovered it independently but his telegram arrived a few hours after Dollfus').
		Larson[?] and Fountain[?] determined in 1978 that there are in fact two moons sharing one orbit.
	www.ebroadcast.com.au /lookup/encyclopedia/ja/Janus_(moon).html (158 words)

	Ville de Meudon : du cerf-volant à l'avion
		Dollfus annonça qu'il avait détecté une très faible atmosphère à partir des mesures de polarisation menées à l'observatoire du Pic-du-Midi dans les Pyrénées françaises.
		Audouin Dollfus est aussi président de l’Association pour le Centre Européen des Ballons et des Dirigeables et il est aujourd’hui le meilleur ambassadeur du futur musée meudonnais de l’aérostation.
		Dollfus a eu l’idée de réutiliser ce hangar lors du bicentenaire du premier vol en ballon, en 1983.
	www.carnetdevol.org /aerostation/dollfus.htm (885 words)

	Biographie : Audouin Dollfus (1924 -)
		Audouin Dollfus est né le 12 Novembre 1924, d’un père aéronaute et conservateur du Musée de l’Aéronautique (Charles Dollfus, 1893 — 1981).
		Audouin Dollfus, qui par un heureux hasard a été initié depuis toujours au voyage en ballon, va ainsi marier ses deux passions.
		Audouin Dollfus et Bernard Lyot étudient également la possibilité d’une atmosphère sur la Lune, et bien que le taux de dissipation thermique des gaz soit très élevé, aucune polarisation n’est détectable, la question est donc définitivement close.
	www.astrofiles.net /article52.html (2572 words)

	dollfus plaisir 24 fevrier 2006
		Audouin Dollfus peut alors optimiser son temps au maximum : observant le Soleil le jour au coronographe et la nuit observant les planètes à la lunette (le crépuscule était le bienvenu).
		En analysant la lumière de ces astres par polarimétrie, Audouin Dollfus va mesurer leur diamètre, leur aplatissement polaire, leur densité, leur période de rotation, la cartographie de leur surface, analyser leur atmosphère, identifier leur nuages et leurs vents.
		Audouin Dollfus mesure le diamètre de Mercure lors du transit du 14 novembre 1953 en se plaçant en haut de la Tour Eiffel.
	www.planetastronomy.com /special/2006-special/dollfus-vega-24fev06.htm (2213 words)

	Dollfus, Audouin Charles (Site not responding. Last check: 2007-10-10)
		He was the first to detect a faint atmosphere round the planet Mercury, in 1950, and established that the Moon does not have one.
		Hoping to establish the mineral composition of the Martian deserts, Dollfus checked the polarization of light by several hundreds of different terrestrial minerals to try to find one for which the light matched that polarized by the bright Martian desert areas.
		In 1966 Dollfus discovered Janus, the innermost moon of Saturn, at a time when the rings - to which it is very close - were seen from Earth edgeways on and practically invisible.
	www.cartage.org.lb /en/themes/Biographies/MainBiographies/D/Dollfus/1.html (151 words)

	1996/97 Mars Sketch
		It is described by DOLLFUS that it was because the diameter of the south polar cap was of the dimension of 6 arcsecs that HUYGENS did discover the polar cap on 13 August 1672.
		At another page, Professor DOLLFUS compares his detailed drawing of Mars in 1956 with the famous one by HUYGENS made in 1659 (made on 28 Nov 1659) both of which describe Syrtis Major and alludes to the decisive progress made during the 300 years.
		DOLLFUS is right, but one thing to be noticed is that there is a natural reason why HUYGENS did not write the polar cap in 1659, and in this point HUYGENS' 1659 drawing should not be compared with any drawing in 1956.
	homepage2.nifty.com /~cmo/97Note13.htm (1105 words)

	L'invité
		Son of Charles Dollfus, creator of the Air Museum, and Honorary Astronomer of the Observatoire of Paris-Meudon, Audouin Dollfus is one of the most eminent astronomers of France.
		In 1955, Dollfus had already determined the nature of the ground of Mars.
		Of the installation of the Look-out post of the Peak of Noon (Pic du Midi) to the flights in balloon up to a height of 14 000 and of 30 000 metres with an embarked telescope to study the sun crown, "50 years of astronomy" (EDP Sciences Publishing) is read as a real adventure novel.
	bma2001.phileas.net /endirect/29_07_2001/invite.asp (348 words)

	Janus
		Janus was discovered on Dec. 15, 1966, by Audouin Dollfus and is also known as Saturn X. It is nearly co-orbital (shares its orbit) with Epimetheus and is located between Saturn’s F- and G-rings.
		Because Janus and Epimetheus differ in their orbital radii by only 50 km, their orbital velocities are very nearly equal and the lower, faster one gradually catches up and overtakes the other.
		Although Dollfus is credited with the discovery of Janus, it is not certain whether the object he saw was Janus or Epimetheus and his observations led to a spurious orbit.
	www.daviddarling.info /encyclopedia/J/Janus.html (365 words)

	Strange Lights Seen on the Moon
		French astronomer, Audouin Dollfus of Observatoire de Paris, has recently finished analyzing his 1992 observation of disturbances on the lunar surface.
		On December 30, 1992, Dollfus witnessed something on the moon that was not there the day before.
		Dollfus believes that the glows are caused by escaping gas that lifts dust off the lunar surface, into the sunlight.
	www.21stcenturyradio.com /lightsonmoon-12.10.00.htm (280 words)

	Астронет > Langrenus
		The experienced French astronomer Audouin Dollfus discovered that the northern floor of Langrenus temporarily brightened when seen in polarized light on December 30, 1992 and January 2, 1993.
		Dollfus' interpretation was that the bright polarized areas were produced by outgassing that lifted dust above the crater floor.
		Audouin Dollfus (2000) Langrenus: Transient Illuminations on the Moon, Icarus 430-443
	www.astronet.ru /db/msg/eid/lpod040418 (353 words)

	1998 Prizes for Scientific and Technological Culture
		The jury wished to honor Audouin Dollfus, an internationally renowned astronomer and explorer of the solar system.
		Audouin Dollfus has also won several world records (flight duration, distance, altitude, in 1953 and 1955) and brought back remarkable scientific findings from his trips.
		Audouin Dollfus has received numerous distinctions, among which the Janssen prize, the highest distinction for astronomy in France.
	www.cnrs.fr /cw/en/nomi/prix/pcst98.html (1099 words)

	Dollfus, Audouin Charles (1924-)
		A French astronomer who, in 1966, discovered what was, at the time, the innermost known moon of Saturn, Janus.
		Before the first planetary probes, Dollfus sought evidence for tenuous atmospheres around Mercury and the Moon, and made the first ascent in a stratospheric balloon in France in order to carry out detailed studies of Mars.
		Before the Viking landings, he correctly concluded, from polarization experiments with hundreds of different terrestrial minerals and polarization observations of the Red Planet, that the Martian deserts are strewn with iron oxide (Fe Since 1946, he has been at the Meudon Observatory outside Paris.
	www.daviddarling.info /encyclopedia/D/Dollfus.html (169 words)

	Dollfus Audouin Oral history interview with Audouin Dollfus, 1986 September 2 and 14 January 1987. AIP International ... (Site not responding. Last check: 2007-10-10)
		Dollfus Audouin Oral history interview with Audouin Dollfus, 1986 September 2 and 14 January 1987.
		Oral history interview with Audouin Dollfus, 1986 September 2 and 14 January 1987.
		Communications and interactions with astronomers active in solar system research (G. Kuiper); extensive picture of efforts by Dollfus to study sun and planets through manned balloons (August Piccard, John Strong), 1950s and 1960s; attempts to measure water vapor in atmosphere of Mars.
	www.aip.org /history/catalog/icos/6876.html (241 words)

	Janus
		Discovered by the French astronomer Audouin Dollfus in 1966.
		Dollfus is credited with the discovery of Janus but it's not really certain whether the object he saw was Janus or Epimetheus and his observations led to a spurious orbit.
		(Walker discovered it independently but his telegram arrived a few hours after Dollfus'.) Larson and Fountain determined in 1978 that there are in fact two moons at about 151000 km from Saturn.
	www.nineplanets.org /janus.html (248 words)

	Nougat of the Day (Site not responding. Last check: 2007-10-10)
		His colony near the Tiber is supposed to have given the name to the Janiculum Hill.
		One of the moons of Saturn was named Janus by French astronomer Audouin Dollfus in 1966.
		He may have been thinking of the story that Janus welcomed Saturn to earth after the latter was driven out of Olympia by Zeus.
	spotlightongames.com /nougat/21.html (496 words)

	Pif News / L'invité de la semaine / Audouin Dollfus (Site not responding. Last check: 2007-10-10)
		Né à Paris en 1924, l'infatigable explorateur du Système solaire Audouin Dollfus est astronome honoraire à l'Observatoire de Paris-Meudon.
		Pour sa construction, Audouin Dollfus bénéficia notamment du soutien d'ingénieurs de "l'Aluminium français", du Centre technique de l'aluminium et de l'observatoire de Meudon.
		Janus, la Lune de Jupiter découverte par Audouin Dollfus en 1966, photographiée le 18 février 2005 par la sonde américaine Cassini.
	pif.allolespace.com /invites_semaine/ad (1231 words)

	Un siècle d'astronomie, Audouin Dollfus, Livres sur Fnac.com
		Un siècle d'astronomie, Audouin Dollfus, Livres sur Fnac.com
		Je souhaite que le choix de ces textes témoins des progrès explosifs de l'astronomie, fasse vibrer le lecteur devant la pratique de la science astronomique et les résultats de l'astrophysique qui ont transformé la vision du monde.
		(Audouin Dollfus, Astronome honoraire de l'Observatoire de Paris)
	www4.fnac.com /Shelf/Article.aspx?PRID=1399649 (330 words)

	Langrenus (crater) at AllExperts
		In the past this crater has not been noted as a site for observing transient lunar phenomenon.
		However on December 30, 1992, Audouin Dollfus of the Observatoire de Paris observed a series of glows on the floor of this crater using the one-meter telescope.
		These glows changed form with time, and Professor Dollfus expressed the belief that this was likely a gaseous emission.
	en.allexperts.com /e/l/la/langrenus_(crater).htm (422 words)

	History and Technical Notes
		In 1954, Gary Cashman made several flights in the Albany, New York area using hydrogen-filled weather balloons attached to a seat on which he rode.
		In 1959, Audouin Dollfus carried scientific instruments to 40,000 feet using a chain of 105 balloons that stood 1,500 feet tall.
		Don Piccard, son of Jean and a major figure in the development of the modern sport of hot-air ballooning, made flights using clusters of plastic balloons in 1957 and 1962, including a flight to 17,747 feet that still stands as a world altitude record for category AA-2 balloons.
	www.clusterballoon.org /history.htm (898 words)

	[No title]
		Né en 1924, Audouin Dollfus rêvait de devenir astronome dès l’âge de huit ans, depuis la découverte dans la bibliothèque de ses grands-parents d’un livre, Le Ciel d’André Guillemin.
		En bas, les dimensions sont exprimées en secondes d'arc à la distance de 10 UA d'après les mesures au micromètre à double image de H. Camichel, J. Focas et A. Dollfus.
		La division de Cassini a pour diamètre exactement les 2/3 de celui de l’orbite du satellite Mimas ; elle s’explique donc par l’élimination des particules situées initialement dans le plasma original à la distance de Mimas.
	membres.lycos.fr /astrojan/decjanus.htm (3508 words)

	Sea and Sky's Tour of the Solar System: Other Saturnian Moons
		It was named after the ancient god of gates and doorways, who was often depicted with two faces looking in opposite directions.
		Janus was first discovered by the French astronomer Audouin Dollfus in 1966.
		Although he is credited with the discovery, it is not certain whether what he saw was Janus or Epimetheus.
	www.seasky.org /solarsystem/sky3g9.html (1709 words)

	USGS Astrogeology: Gazetteer of Planetary Nomenclature - History
		These works were adopted by the IAU and became the recognized sources for lunar nomenclature.
		Martian nomenclature was clarified in 1958, when an ad hoc committee of the IAU chaired by Audouin Dollfus recommended for adoption the names of 128 albedo features (bright, dark, or colored) observed through ground-based telescopes (IAU, 1960).
		These names were based on a system of nomenclature developed in the late 19th century by the Italian astronomer G.V. Schiaparelli (1879) and expanded in the early 20th century by E.
	planetarynames.wr.usgs.gov /history.html (616 words)

	Ville de Meudon : du cerf-volant à l'avion
		C'est aux premiers conservateurs, le capitaine Hirschauer et Charles Dollfus, que le musée de l'air actuel doit sa richesse.
		Quand on découvre la passion d'Audouin Dollfus, on ne peut que soutenir ses projets.
		De plus, Carnet de Vol, tout comme Audouin Dollfus, est aussi adhérent de l'association OBD (Objectif Base Dirigeables) qui regroupe actuellement des personnes de différents domaines, aux compétences complémentaires, qui ont décidé de s'associer pour rechercher en France un lieu pour devenir une base dirigeables.
	www.carnetdevol.org /aerostation/projet.htm (1052 words)

	TDb
		Mars as the Abode of Life" has recently been re-issued in paperback at the affordable price of $35.00.
		La Planète Mars" has been reprinted by a French publisher, as well as a fascinating autobiography by the great Audouin Dollfus.
		If you are interested in acquiring copies, I will gladly provide details.
	homepage2.nifty.com /~cmomn/259TDb.htm (281 words)

	BBC News \| SCI/TECH \| Lights glow on Moon
		Now a French astronomer has obtained some of the best evidence yet that occasionally something does disturb the lunar surface.
		It was seen in 1992 by veteran lunar observer Audouin Dollfus of the Observatoire de Paris using the one metre (39 inch) Meudon reflecting telescope.
		Professor Dollfus observed them for several days before they faded.
	news.bbc.co.uk /1/hi/sci/tech/789095.stm (399 words)

	[No title] (Site not responding. Last check: 2007-10-10)
		In identifying lunar maps published by the DMA or ACIC in the 1960's and early 1970's or Soviet maps of Venus published in 1985 and 1986, we use different systems of identification, shown in the appendicies.
		Most of the satellites were named for Titans who, according to Greek mythology, were brothers and sisters of Saturn.
		Janus Discovered by Audouin Dollfus in 1966, this small satellite was later proven to have a twin, Epimetheus, sharing the same orbit but never actually meeting.
	www.lpi.usra.edu /catalogs/gazeteer.txt (7203 words)

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