Comet 81P/Wild 2 under a microscope.

نویسندگان

  • Don Brownlee
  • Peter Tsou
  • Jérôme Aléon
  • Conel M O'd Alexander
  • Tohru Araki
  • Sasa Bajt
  • Giuseppe A Baratta
  • Ron Bastien
  • Phil Bland
  • Pierre Bleuet
  • Janet Borg
  • John P Bradley
  • Adrian Brearley
  • F Brenker
  • Sean Brennan
  • John C Bridges
  • Nigel D Browning
  • John R Brucato
  • E Bullock
  • Mark J Burchell
  • Henner Busemann
  • Anna Butterworth
  • Marc Chaussidon
  • Allan Cheuvront
  • Miaofang Chi
  • Mark J Cintala
  • B C Clark
  • Simon J Clemett
  • George Cody
  • Luigi Colangeli
  • George Cooper
  • Patrick Cordier
  • C Daghlian
  • Zurong Dai
  • Louis D'Hendecourt
  • Zahia Djouadi
  • Gerardo Dominguez
  • Tom Duxbury
  • Jason P Dworkin
  • Denton S Ebel
  • Thanasis E Economou
  • Sirine Fakra
  • Sam A J Fairey
  • Stewart Fallon
  • Gianluca Ferrini
  • T Ferroir
  • Holger Fleckenstein
  • Christine Floss
  • George Flynn
  • Ian A Franchi
  • Marc Fries
  • Z Gainsforth
  • J-P Gallien
  • Matt Genge
  • Mary K Gilles
  • Philipe Gillet
  • Jamie Gilmour
  • Daniel P Glavin
  • Matthieu Gounelle
  • Monica M Grady
  • Giles A Graham
  • P G Grant
  • Simon F Green
  • Faustine Grossemy
  • Lawrence Grossman
  • Jeffrey N Grossman
  • Yunbin Guan
  • Kenji Hagiya
  • Ralph Harvey
  • Philipp Heck
  • Gregory F Herzog
  • Peter Hoppe
  • Friedrich Hörz
  • Joachim Huth
  • Ian D Hutcheon
  • Konstantin Ignatyev
  • Hope Ishii
  • Motoo Ito
  • Damien Jacob
  • Chris Jacobsen
  • Stein Jacobsen
  • Steven Jones
  • David Joswiak
  • Amy Jurewicz
  • Anton T Kearsley
  • Lindsay P Keller
  • H Khodja
  • A L David Kilcoyne
  • Jochen Kissel
  • Alexander Krot
  • Falko Langenhorst
  • Antonio Lanzirotti
  • Loan Le
  • Laurie A Leshin
  • J Leitner
  • L Lemelle
  • Hugues Leroux
  • Ming-Chang Liu
  • K Luening
  • Ian Lyon
  • Glen Macpherson
  • Matthew A Marcus
  • Kuljeet Marhas
  • Bernard Marty
  • Graciela Matrajt
  • Kevin McKeegan
  • Anders Meibom
  • Vito Mennella
  • Keiko Messenger
  • Scott Messenger
  • Takashi Mikouchi
  • Smail Mostefaoui
  • Tomoki Nakamura
  • T Nakano
  • M Newville
  • Larry R Nittler
  • Ichiro Ohnishi
  • Kazumasa Ohsumi
  • Kyoko Okudaira
  • Dimitri A Papanastassiou
  • Russ Palma
  • Maria E Palumbo
  • Robert O Pepin
  • David Perkins
  • Murielle Perronnet
  • P Pianetta
  • William Rao
  • Frans J M Rietmeijer
  • François Robert
  • D Rost
  • Alessandra Rotundi
  • Robert Ryan
  • Scott A Sandford
  • Craig S Schwandt
  • Thomas H See
  • Dennis Schlutter
  • J Sheffield-Parker
  • Alexandre Simionovici
  • Steven Simon
  • I Sitnitsky
  • Christopher J Snead
  • Maegan K Spencer
  • Frank J Stadermann
  • Andrew Steele
  • Thomas Stephan
  • Rhonda Stroud
  • Jean Susini
  • S R Sutton
  • Y Suzuki
  • Mitra Taheri
  • Susan Taylor
  • Nick Teslich
  • Kazu Tomeoka
  • Naotaka Tomioka
  • Alice Toppani
  • Josep M Trigo-Rodríguez
  • David Troadec
  • Akira Tsuchiyama
  • Anthony J Tuzzolino
  • Tolek Tyliszczak
  • K Uesugi
  • Michael Velbel
  • Joe Vellenga
  • E Vicenzi
  • L Vincze
  • Jack Warren
  • Iris Weber
  • Mike Weisberg
  • Andrew J Westphal
  • Sue Wirick
  • Diane Wooden
  • Brigitte Wopenka
  • Penelope Wozniakiewicz
  • Ian Wright
  • Hikaru Yabuta
  • Hajime Yano
  • Edward D Young
  • Richard N Zare
  • Thomas Zega
  • Karen Ziegler
  • Laurent Zimmerman
  • Ernst Zinner
  • Michael Zolensky
چکیده

The Stardust spacecraft collected thousands of particles from comet 81P/Wild 2 and returned them to Earth for laboratory study. The preliminary examination of these samples shows that the nonvolatile portion of the comet is an unequilibrated assortment of materials that have both presolar and solar system origin. The comet contains an abundance of silicate grains that are much larger than predictions of interstellar grain models, and many of these are high-temperature minerals that appear to have formed in the inner regions of the solar nebula. Their presence in a comet proves that the formation of the solar system included mixing on the grandest scales.

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منابع مشابه

Comment on "Organics captured from comet 81P/Wild 2 by the Stardust spacecraft".

Sandford et al. (Reports, 15 December 2006, p. 1720) reported on organic compounds captured from Comet 81P/Wild 2 by the Stardust spacecraft. We emphasize the difficulty in assigning the origin of compounds detected diffusely along particle impact tracks and show that rapid heating of aerogel that has never been exposed to cometary particle capture can generate complex aromatic molecules from l...

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Comparison of comet 81P/Wild 2 dust with interplanetary dust from comets.

The Stardust mission returned the first sample of a known outer solar system body, comet 81P/Wild 2, to Earth. The sample was expected to resemble chondritic porous interplanetary dust particles because many, and possibly all, such particles are derived from comets. Here, we report that the most abundant and most recognizable silicate materials in chondritic porous interplanetary dust particles...

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Variety of Organic Matter in Stardust Return Samples from Comet 81p/wild 2

Introduction: The Stardust mission captured dust particles from comet 81P/Wild 2 and returned them to Earth. Since this material has been cryogenically stored within the comet for billions of years, the Star-dust samples represent early nebular condensates and some presolar material, identified by anomalous isotopic fractionation outside the range of solar values. Carbonaceous matter has been i...

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Chondrulelike objects in short-period comet 81P/Wild 2.

The Stardust spacecraft returned cometary samples that contain crystalline material, but the origin of the material is not yet well understood. We found four crystalline particles from comet 81P/Wild 2 that were apparently formed by flash-melting at a high temperature and are texturally, mineralogically, and compositionally similar to chondrules. Chondrules are submillimeter particles that domi...

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Infrared spectroscopy of comet 81P/Wild 2 samples returned by Stardust.

Infrared spectra of material captured from comet 81P/Wild 2 by the Stardust spacecraft reveal indigenous aliphatic hydrocarbons similar to those in interplanetary dust particles thought to be derived from comets, but with longer chain lengths than those observed in the diffuse interstellar medium. Similarly, the Stardust samples contain abundant amorphous silicates in addition to crystalline si...

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Water production in comet 81P/Wild 2 as determined by Herschel/HIFI ***

The high spectral resolution and sensitivity of Herschel/HIFI allows for the detection of multiple rotational water lines and accurate determinations of water production rates in comets. In this Letter we present HIFI observations of the fundamental 110–101 (557 GHz) ortho and 111–000 (1113 GHz) para rotational transitions of water in comet 81P/Wild 2 acquired in February 2010. We mapped the ex...

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عنوان ژورنال:
  • Science

دوره 314 5806  شماره 

صفحات  -

تاریخ انتشار 2006