By S.F. Green, I. Williams, T. McDonnell, N. McBride
Because the final joint IAU and COSPAR Colloquium in Gainesville in 1995, there were dramatic alterations within the box due to in-situ house experiments, Earth orbiting satellites and floor dependent observations. The brightest comet because the early years of the 20th century, comet Hale-Bopp, seemed, giving a useful chance to work out in motion one nice resource of interplanetary airborne dirt and dust. equally, the Leonid meteor bathe has been at its such a lot lively in view that 1966, generating outstanding screens of meteors and bearing in mind an array of observational innovations, no longer to be had in 1966 for use, whereas concept has additionally been sophisticated to a degree the place very exact predictions of the timing of meteor storms has turn into attainable. ahead of the assembly a complete eclipse of the sunlight in South West England and North Europe was once saw, routinely an excellent chance to monitor the Zodiacal cloud. the information of the Near-Earth Asteroid inhabitants has additionally elevated dramatically, with the elevated examine coming up from the heightened wisdom of the chance to Earth from such our bodies. Extrasolar planets were came upon because the final assembly and it's recognized that interplanetary airborne dirt and dust in different Planetary structures can now be studied. because a lot of the airborne dirt and dust saw in such structures is at a distance of order a hundred AU from the big name, this brings into concentration the construction of dirt within the Edgeworth-Kuiper belt of our personal process. contemporary years have noticeable a reputation of the significance of airborne dirt and dust originating open air our personal approach, that's now found in the near-Earth surroundings. As is usually the case while nice strides ensue observationally, a lot theoretical paintings follows, and a similar is correct during this example. whereas facts concerning the planetary medium from Venus to Jupiter used to be commencing to be on hand on the assembly in 1995, the knowledge from either Galileo and Ulysses have now been extra totally analysed, with a corresponding raise in our wisdom. This ebook displays the thematic process followed on the assembly, with a stream outwards (from meteors within the surroundings, via zodiacal dirt remark and interplanetary airborne dirt and dust, to additional sunlight planetary structures) and returning (via the Edgeworth-Kuiper belt and comets) to the Earth, with laboratory reviews of actual and chemical approaches and the learn of extra-terrestrial samples.
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Additional info for Dust in the solar system and other planetary systems: proceedings of the IAU Colloquium 181, held at the University of Kent, Canterbury, U.K., 4-10 April 2000
The data is shown in Table 1. If we assume that the flares are a consequence of simultaneous detachment of a large number of meteoroid grains we can match the observed flare duration with predictions based -24- The size of meteoroid constituent grains on numerical modeling of the atmospheric ablation of these grains . We assume that the grains are spherical, with an average bulk density of 1000 kg m -3, and with a sum of latent heat of vaporization plus fusion of 6x106 J kg l. The grain mass which best matches the height of maximum luminosity of the flare is given in the final column of Table 1.
The Doppler-based velocity/deceleration results provide a direct method to determine this flux. We compared our results with those reported by Ceplecha et al.  and find reasonably good agreement if we include those events that no deceleration is observed. We will greatly enhance our meteor database in the next year as well as refine our deceleration determinations. This should yield firmer flux estimates. REFERENCES 1. J. Ceplecha, J. G. O. L. Hawkes, V. Porubcan and M. Simek, Space Sci. Rev.
Ocenas and D. Zimnikoval) Int. Meteor Org, Antwerp (1993) 28. P. D. Campbell, K. L. Hawkes, J. Jones, P. Gural, D. Babcock, C. K. Bartlett and M. Bedard, Earth Moon Planets 83 (2000) 167. L. C. Woodworth, J. Roy. Astron. Soc. Can. 91 (1997) 91. S. Murray, M. Beech, M. Taylor, P. L. Hawkes, Earth Moon Planets 82 (2000) 351. A. L. Hawkes, WGN J. Inter. Meteor Org. 21 (1993) 168. M. Kinoshita, T. Maruyama and S. Sagayama, Geophys. Res. Lett. 26 (1999) 41. G. S. L. P. D. Campbell, P. Brown, P. R. Correll, T.