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Topic: Didier Queloz


In the News (Tue 15 Dec 09)

  
  ESA - Space Science - Planet discoverer: An interview with Didier Queloz
Didier Queloz and his colleagues at the Observatoire de Genève, Switzerland, have found many of these new planets, and their discoveries include the most tantalising one yet: a planet that closely resembles Jupiter in our own Solar System.
Queloz is a member of ESA's Scientific Advisory Group for its Darwin planet-search mission.
Didier Queloz: ESA's Darwin is a fantastic project for me because, behind all of this planet quest, is this question of life on other worlds.
www.esa.int /esaSC/SEMK13T1VED_index_0_iv.html   (809 words)

  
  Didier Queloz at AllExperts
Didier Queloz (born February 23 1966) is a Geneva-based astronomer with a prolific record in finding extrasolar planets.
Didier Queloz was a Ph.D. student at the University of Geneva when he and Michel Mayor discovered the first exoplanet around a main sequence star.
Queloz performed an analysis on 51 Pegasi using radial velocity measurements (doppler effect), and was astonished to find a planet with an orbital period of 4.2 days.
en.allexperts.com /e/d/di/didier_queloz.htm   (218 words)

  
  Didier Queloz - Wikipedia, the free encyclopedia
Didier Queloz (born February 23, 1966) is a Geneva-based astronomer with a prolific record in finding extrasolar planets.
Didier Queloz was a Ph.D. student at the University of Geneva when he and Michel Mayor discovered the first exoplanet around a main sequence star.
Queloz performed an analysis on 51 Pegasi using radial velocity measurements (doppler effect), and was astonished to find a planet with an orbital period of 4.2 days.
en.wikipedia.org /wiki/Didier_Queloz   (134 words)

  
 [No title]
The discovery of a Jupiter--mass planet in orbit around the solar--type star 51Peg has been reported by Michel Mayor and Didier Queloz (Geneva Observatory) on October 6th at the 9th Cambridge workshop on "cool stars, stellar systems, and the sun" held at Florence (Italy).
On Oct. 6, Michel Mayor and Didier Queloz at Geneva Observatory announced that 51 Pegasus has a planet orbiting it.
We find a period of 4.2 days which is presumably the orbital period of the unseen companion as it gravitationally pulls its host star around in a circle.
zebu.uoregon.edu /51peg.html   (2336 words)

  
 NASA Recruits Two Experts To Hunt For New Planets   (Site not responding. Last check: )
Didier Queloz, a Swiss astronomer who co-discovered the first known planet around a star similar to our Sun, is a distinguished visiting scientist at JPL for the next year and a half.
Queloz, a Swiss citizen, received his degree in physics in 1990 from the University of Geneva and worked on his doctoral thesis at Geneva Observatory with Professor Michel Mayor from 1991 to 1995.
Queloz is continuing his hunt for new planets with the Elodie telescope and its twin, Coralie, a Swiss telescope in La Silla, Chile.
www.virtuallystrange.net /ufo/updates/1998/mar/m11-017.shtml   (1296 words)

  
 Extrasolar planet - Article from FactBug.org - the fast Wikipedia mirror site
The first definitive extrasolar planet around a main sequence star (51 Pegasi) was announced on October 6, 1995 by Michel Mayor and Didier Queloz.
The first verified discovery of an exoplanet (51 Pegasi B) orbiting a main sequence star (51 Pegasi) was announced on October 6, 1995 by Michel Mayor and Didier Queloz in Nature, volume 378, page 355.
Didier Queloz — with Mayor, discovered first planet around a main-sequence star.
www.factbug.org /cgi-bin/a.cgi?a=9763   (2876 words)

  
 postdoc & students : science career articles on science postdocs, science PhD students and science students : ...
Ten years ago, during his postdoctoral fellowship at Geneva, Queloz worked with Michel Mayor on one of the hottest topics in astrophysics at the time, the hunt for the first extrasolar planet.
Queloz says that trust was never more evident than when he showed Mayor his results, which included evidence of a surprisingly large Jupiter-like planet with a tiny four-day orbit.
When Queloz said he was sure, Mayor supported him and his data to ensure they published a strong paper.
www.nature.com /naturejobs/2006/060817/full/nj7104-842a.html   (1753 words)

  
 Nature Science Update - article
This is a new and unexpected type of oscillation, which is why Drs Mayor and Queloz discounted that explanation for their results, but their equipment did not have the ability to measure the subtle variations that Dr Gray has found.
No criticism of Drs Mayor and Queloz is intended or justified -- they did the best they could with their equipment, and realized that someone might eventually find just what Gray has seen.
Another group, based at San Francisco State University, posted a rebuttal of Gray's paper on their world-wide web page (http://cannon.sfsu.edu/~williams/planetsearch/nrp.html) last week, before the appearance of Dr Gray's paper in Nature: meaning that astronomers were unable to assess the merits of Dr Gray's arguments at the same time as the rebuttal.
exoplanets.org /nature_sage.html   (1204 words)

  
 "Another planet is found that circles its own sun"
The discoverers, Michel Mayor and Didier Queloz of Geneva Observatory, did not see the planet directly.
The effect is known as the Doppler shift - wavelengths appear to lengthen as the star moves away from us and shorten as it moves closer.
Mayor and Queloz announced their finding at a meeting in Florence, Italy, earlier this month.
sln.fi.edu /inquirer/planet.html   (541 words)

  
 Science Notes 2000--In Search of Small Planets
Astronomers Michel Mayor and Didier Queloz at the University of Geneva in Switzerland were the next to catch the brass ring in 1995, but this time the star was like our sun.
The planet that Mayor and Queloz found seemed at first like an cosmic freak, but it turns out there are a fair number of strange planet-sun relationships out there.
Among the initial doubters of the Mayor and Queloz planet were Geoff Marcy and Paul Butler, then at the University of California, Berkeley.
scicom.ucsc.edu /SciNotes/0001/planets.htm   (3198 words)

  
 Origins: Library: News: Search for Extrasolar Planets
While six of them are most likely bona-fide exoplanets, two are apparently very low-mass brown-dwarfs (objects of sub-stellar mass without a nuclear energy source in their interior).
From the first discovery of an exoplanet around the star 51 Pegasi in 1995 (by Michel Mayor and Didier Queloz of the present team), the exoplanet count is now already above 40.
The sizes and shapes of the orbits of the eight new planets and brown-dwarf candidates are illustrated in Photo 12/00.
origins.jpl.nasa.gov /library/extrasolar/050800-a_old.html   (1553 words)

  
 "Another planet is found that circles its own sun"
The discoverers, Michel Mayor and Didier Queloz of Geneva Observatory, did not see the planet directly.
The effect is known as the Doppler shift - wavelengths appear to lengthen as the star moves away from us and shorten as it moves closer.
Mayor and Queloz announced their finding at a meeting in Florence, Italy, earlier this month.
www.fi.edu /inquirer/planet.html   (541 words)

  
 Strange Places
The landmark discovery bolsters the belief that planetary systems--some of which may include habitable worlds-- are a common result of the way that ordinary stars are born.
Mayor and Queloz inferred the presence of the planet by monitoring the light from 51 Pegasi, which is faintly visible to the naked eye in the constellation Pegasus.
After 18 months of painstaking observations, Mayor and Queloz concluded that the star is being swung about by the gravitational pull of a small, unseen object--a planet.
www.sciamdigital.com /index.cfm?fa=Products.ViewIssuePreview&ARTICLEID_CHAR=1300DB2A-BEED-4654-A3F8-B8FB74221C3   (186 words)

  
 Alpha Centauri's Universe: Exploration Of 51 Pegasi   (Site not responding. Last check: )
Last year, when Michel Mayor and Didier Queloz of the Geneva Observatory reported the first solid evidence of a planet circling a sun-like star outside the solar system, many astrophysicists were taken aback.
After all, the technique that Mayor and Queloz had used was most sensitive to large planets in tight orbits.
But further discoveries over the past year have uncovered nine other "extrasolar" planets, and three of these bodies, in addition to the one around 51 Pegasi, are rapidly circling at a celestial hair's breadth from their stars.
www.earthandspace.info /contents/file0061b.htm   (672 words)

  
 Rocky Planet Found Outside Solar System - Space - RedOrbit
The planet, whose mass is 14 times greater than Earth, is close to its parent star - only one-tenth of the distance of the sun from the Earth - and therefore too hot to support any known form of life.
Mr Queloz estimated the surface temperature to be 650 degrees celsius.
Although planet-hunting technology is advancing rapidly, it will probably be a decade before astronomers can reliably detect Earth- sized planets at the right distance from their parent star to support the chemical processes that could give rise to life.
www.redorbit.com /news/space/86202/rocky_planet_found_outside_solar_system/index.html   (332 words)

  
 Scientific American: A Parade of New Planets
Then last October, Michel Mayor and Didier Queloz of Geneva Observatory detected a planet circling the star 51 Pegasi--and the floodgates opened.
More discoveries are surely on the way: Marcy reports that "we see hints of planets in a lot of our data." His group has set up a dedicated planet-search Web site to keep up with the rapid progress of the work.
Marcy and Butler, like Mayor and Queloz and several other teams, examine spectra for the tiny displacements that could denote the presence of planets.
www.sciam.com /print_version.cfm?articleID=000BAF7C-7457-1C76-9B81809EC588EF21   (1242 words)

  
 SPACE.com -- Another Jupiter Twin Found in Flood of Planet Discoveries
Queloz serves on the scientific advisory group for the ESA's Darwin project, a plan to send a flotilla of eight spacecraft, flying in formation, detect and photograph Earth-like planets and search their atmospheres for signs of life.
In 2012, ESA plans to launch Gaia to survey the nearest one billion stars for precise data of their position and brightness, and search for extrasolar planets using the wobble and transit-methods.
Queloz is optimistic about Darwin's chances of finding life, in one form or another, in the planets it locates.
www.space.com /scienceastronomy/astronomy/extrasolar_jupiter_020619.html   (980 words)

  
 Queloz-Mayor L2 Orbital Observatory - Scratchpad Wiki Labs - Free wikis from Wikia
This is a full spectrum telescope array orbiting the Sol at the Earth L2 Lagrange point.
It was named for Didier Queloz and Michaels Mayor, the discoverers of the first extra-solar planets orbiting 51 Pegasi.
Queloz-Mayor is comprised of six, six node telescope interferometer that are the equivalent in the optical spectrum of 10,000km mirror.
scratchpad.wikia.com /wiki/Queloz-Mayor_L2_Orbital_Observatory   (315 words)

  
 ASP: Planet-Building on the Grandest Scales
Apart from the numerous comets and asteroids, it consists of four rocky planets (Mercury, Venus, Earth, and Mars), two giant gaseous planets (Jupiter and Saturn), two ice giant planets (Uranus and Neptune), and one icy planet with a comparably sized companion (Pluto and Charon).
In 1995, however, Michel Mayor and Didier Queloz, working at the Geneva Observatory, reported the discovery of an object with a mass approximately half that of Jupiter orbiting the star 51 Pegasi.
This object was detected using the radial velocity, or “Doppler wobble,” technique; the method uncovers the small radial motion imposed by the orbiting planet on its parent star and manifest as small-scale, periodic shifts of features in the star’s spectrum.
www.astrosociety.org /pubs/mercury/33_02/planet.html   (407 words)

  
 How small are small stars really?
The measured angular diameter of Proxima Centauri is 1.02 +- 0.08 milliarcsec, or about the size of an astronaut on the surface of the Moon as seen from the Earth (or a head of a pin on the surface of the Earth, as seen from the International Space Station).
Didier Queloz of the Geneva Observatory is content: "The measured sizes agree well with theoretical predictions, based on numerical models of planets and low-mass stars.
The same holds for the sizes of a number of more massive stars that were measured at the same time.
www.eurekalert.org /pub_releases/2002-11/eso-hsa112902.php   (1430 words)

  
 MAYOR, MICHEL - CIRS   (Site not responding. Last check: )
It is thanks to this instrument, and its successive improvements, that Mayor has attained the extraordinary precision of a few meters per second in these velocities.
This has led to the first detection of a planet outside our solar system by Mayor and his postgraduate student Didier Queloz in the year 1995.
Queloz, G. Henry, J.-P. Sivan, S. Baliunas, J.-L. Beuzit, R. Donahue, M. Mayor, D. Naef, C. Perrier, S. Udry
www.cirs-tm.org /researchers/researchers.php?id=168   (342 words)

  
 ESA Science & Technology: ESA paves the way for an avalanche of new extrasolar planet discoveries
An interview with Didier Queloz, one of the world's most successful planet hunters.
Didier Queloz and his colleagues at the Observatoire de Genève, Switzerland, have found a dozen of the new planets.
European planet-hunters Didier Queloz (left) and Michel Mayor
sci.esa.int /content/news/index.cfm?aid=1&cid=1&oid=30133   (1068 words)

  
 JPL scientists hunt for new planets and life
The appointments highlight a new JPL initiative to unite scientists from various disciplines, such as biology and astronomy, to study the evolution of planets and life in the universe.
Dr. Kenneth Nealson has joined JPL as a senior researcher in astrobiology, a new field whose goal is to understand how planets and life co-evolve.
When Queloz and Mayor first detected a Doppler shift from the star 51 Pegasus, Queloz said their first reaction was, "We'd better check our instruments."
www.jpl.nasa.gov /releases/98/quelneal.html   (1149 words)

  
 mobileCatalog: New Planets
They found all the binary companions that they could, but there were another 200 or so G-type stars that didn\\\'t seem to have any binary companions.
Subsequently, Michel Mayor, along with Didier Queloz, decided to look at these 200-odd stars, potential solar analogs, to see if they had planetary systems.
The technique they used involved looking for stellar wobbles, cyclical changes in the stars\\\' radial velocity, induced by the gravitational tug of orbiting planets.
www.astrobio.net /cgi-bin/emobileCatalog.cgi?sid=1640&ext=.html   (923 words)

  
 NOVA Online/Hunt for Alien Worlds/Find the Planets
Three years later, Michel Mayor and Didier Queloz ended the long quest to detect a planet around a star like our own sun.
When Mayor and Queloz first described the planet they had discovered around 51 Pegasi, many astronomers were stunned.
It raced around its parent star in a 4.2 day orbit -- putting it 500 times closer to its star than the Earth is to the sun.
www.pbs.org /wgbh/nova/worlds/planets.html   (708 words)

  
 Planets Beyond Our Solar System | Science and Its Times: 1950-Present
They wondered whether planets were common to other stars or rare, whether other planetary systems were similar to our own, and ultimately whether Earth was the only planet in the universe that could support life as we know it.
In 1995 Michel Mayor and Didier Queloz of the Geneva Observatory announced that they had collected data verifying the existence of a planet around a star other than the Sun.
When Mayor and Queloz announced evidence of the first planet orbiting a Sun-like star, and other astronomers began reporting additional planets, the excitement in the scientific community was palpable.
www.bookrags.com /research/planets-beyond-our-solar-system-scit-0712345   (1616 words)

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