Comparison of Comet 81P/Wild 2 Dust with Interplanetary Dust from Comets

  title={Comparison of Comet 81P/Wild 2 Dust with Interplanetary Dust from Comets},
  author={Hope A. Ishii and John P. Bradley and Zu Rong Dai and Miaofang Chi and Anton T. Kearsley and Mark J. Burchell and Nigel D. Browning and Frank J. Molster},
  pages={447 - 450}
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 appear to be absent from the returned sample, indicating that indigenous outer nebula material is… 

The asteroid-comet continuum from laboratory and space analyses of comet samples and micrometeorites

Abstract Comets are probably the best archives of the nascent solar system, 4.5 Gyr ago, and their compositions reveal crucial clues on the structure and dynamics of the early protoplanetary disk.

The Stardust Mission: Analyzing Samples from the Edge of the Solar System

Comet samples returned to Earth by the NASA Stardust mission have provided a surprising glimpse into the nature of early Solar System materials and an epiphany on the origin of the initial rocky

Cometary Dust in the Laboratory

Two reports take advantage of the availability of relatively less studied primitive materials—samples obtained by the Stardust mission from comet Wild 2 and Antarctic micrometeorites (AMMs)—to glean information about the early solar system.

Letter. Igneous Ca-rich pyroxene in comet 81P/Wild 2

Abstract The Stardust spacecraft successfully returned dust from comet 81P/Wild 2 to Earth in January 2006. Preliminary examination of the samples showed abundant crystalline silicates comparable to

Overview of the rocky component of Wild 2 comet samples: Insight into the early solar system, relationship with meteoritic materials and the differences between comets and asteroids

Abstract– The solid 2–10 μm samples of comet Wild 2 provide a limited but direct view of the solar nebula solids that accreted to form Jupiter family comets. The samples collected by the Stardust

Connection between micrometeorites and Wild 2 particles: From Antarctic snow to cometary ices

Abstract— We discuss the relationship between large cosmic dust that represents the main source of extraterrestrial matter presently accreted by the Earth and samples from comet 81P/Wild 2 returned

Constraints on the Formation Age of Cometary Material from the NASA Stardust Mission

The data suggest that high-temperature inner solar system material formed, was subsequently transferred to the Kuiper Belt, and was incorporated into comets several million years after CAI formation.



Mineralogy and Petrology of Comet 81P/Wild 2 Nucleus Samples

The bulk of the comet 81P/Wild 2 samples returned to Earth by the Stardust spacecraft appear to be weakly constructed mixtures of nanometer-scale grains, with occasional much larger ferromagnesian silicates, Fe-Ni sulfides,Fe-Ni metal, and accessory phases.

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

Samples of Stars Beyond the Solar System: Silicate Grains in Interplanetary Dust

Six circumstellar silicate grains within interplanetary dust particles (IDPs) are identified, and one of the grains is forsterite, and two are amorphous silicate “GEMS” (glass with embedded metal and sulfides), which is consistent with astronomical identifications of crystalline and amorphously silicates in the outflows of evolved stars.

Identification of molecular-cloud material in interplanetary dust particles

It is shown that H and N isotopic anomalies among fragile ‘cluster’ IDPs are far larger, more common, and less equilibrated than those previously observed in other IDPs or meteorites, suggesting that molecular-cloud material has survived intact.

A Population of Comets in the Main Asteroid Belt

Optical data is presented showing the existence of a population of comets originating in a third reservoir: the main asteroid belt, which lends new support to the idea that main-belt objects could be a major source of terrestrial water.

Comet 81P/Wild 2 Under a Microscope

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

Chemically Anomalous, Preaccretionally Irradiated Grains in Interplanetary Dust from Comets

The measured compositional trends suggest that chemical (as well as isotopic) anomalies can be used to identify presolar interstellar components in primitive meteoritic materials.

Isotopic Compositions of Cometary Matter Returned by Stardust

Hydrogen, carbon, nitrogen, and oxygen isotopic compositions are heterogeneous among comet 81P/Wild 2 particle fragments; however, extreme isotopic anomalies are rare, indicating that the comet is

Analysis of a deuterium‐rich interplanetary dust particle (IDP) and implications for presolar material in IDPs

Deuterium (D)-rich interplanetary dust particles (IDPs) are the most primitive extraterrestrial materials available for laboratory studies in terms of their mineralogy, chemistry, and isotopic

Non-gravitational motion of the Jupiter-family comet 81P/Wild 2 - I. The dynamical evolution

We investigated the influence of the non-gravitational effects on the orbital motion of 81P/Wild 2. First, the non-gravitational accelerations on cometary nucleus throughout all five revolutions