Impact Features on Stardust: Implications for Comet 81P/Wild 2 Dust

Impact Features on Stardust: Implications for Comet 81P/Wild 2 Dust

Particles emanating from comet 81P/Wild 2 collided with the Stardust spacecraft at 6.1 kilometers per second, producing hypervelocity impact features on the collector surfaces that were returned to Earth. The morphologies of these surprisingly diverse features were created by particles varying from...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 2006-12, Vol.314 (5806), p.1716-1719
Hauptverfasser: Hörz, Friedrich, Bastien, Ron, Borg, Janet, Bradley, John P, Bridges, John C, Brownlee, Donald E, Burchell, Mark J, Chi, Miaofang, Cintala, Mark J, Dai, Zu Rong, Djouadi, Zahia, Dominguez, Gerardo, Economou, Thanasis E, Fairey, Sam A.J, Floss, Christine, Franchi, Ian A, Graham, Giles A, Green, Simon F, Heck, Philipp, Hoppe, Peter, Huth, Joachim, Ishii, Hope, Kearsley, Anton T, Kissel, Jochen, Leitner, Jan, Leroux, Hugues, Marhas, Kuljeet, Messenger, Keiko, Schwandt, Craig S, See, Thomas H, Snead, Christopher, Stadermann, Frank J. I, Stephan, Thomas, Stroud, Rhonda, Teslich, Nick, Trigo-Rodríguez, Josep M, Tuzzolino, A.J, Troadec, David, Tsou, Peter, Warren, Jack, Westphal, Andrew, Wozniakiewicz, Penelope, Wright, Ian, Zinner, Ernst
Format: Artikel
Sprache:eng
Schlagworte:
Aerogels
Average linear density
Calibration
Comets
Dust
Impact craters
Particle mass
Projectiles
Size
Size distribution
Space research
Spacecraft
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Zusammenfassung:Particles emanating from comet 81P/Wild 2 collided with the Stardust spacecraft at 6.1 kilometers per second, producing hypervelocity impact features on the collector surfaces that were returned to Earth. The morphologies of these surprisingly diverse features were created by particles varying from dense mineral grains to loosely bound, polymineralic aggregates ranging from tens of nanometers to hundreds of micrometers in size. The cumulative size distribution of Wild 2 dust is shallower than that of comet Halley, yet steeper than that of comet Grigg-Skjellerup.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1135705