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Discovery of interstellar dust entering the Earth's atmosphere

Abstract

ALL known asteroids and comets are believed to have been gravitationally bound to the Sun since they formed (together with the Sun and planets) from the solar nebula. This is because no such object has been observed with a speed exceeding the solar escape velocity, although some comets have been close to this limit1. As comets are occasionally ejected from the Solar System, interstellar comets might be expected to arrive every few centuries, having been ejected from similar systems around other stars2. The flux of interstellar dust into the Solar System should be much higher, but its detection poses significant technological challenges. Recently, the Ulysses spacecraft detected a population of dust particles near Jupiter, identified as being of interstellar origin on the basis of their speeds and trajectories3,4. Here we report the radar detection of interstellar particles in the Earth's atmosphere. From intra-annual variations in particle flux, we infer the existence of two discrete sources, one associated with nearby A-type stars, and the other with the Sun's motion about the Galactic Centre. The data also suggest the presence of a third source, possibly associated with local B-type stars and young stellar clusters.

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References

  1. Kresák, Ľ. Astr. Astrophys. 259, 682–691 (1992).

    ADS  Google Scholar 

  2. Hughes, D. W. J. Br. astr. Assoc. 101, 119–120 (1990).

    ADS  Google Scholar 

  3. Grün, E. et al. Nature 362, 428–430 (1993).

    ADS  Article  Google Scholar 

  4. Grün, E. et al. Astr. Astrophys. 286, 915–924 (1994).

    ADS  Google Scholar 

  5. Baggaley, W. J., Bennett, R. G. T., Steel, D. I. & Taylor, A. D. Quart. Jl. R. astr. Soc. 35, 293–320 (1994).

    ADS  Google Scholar 

  6. Lindblad, B. A. & Steel, D. I. in Asteroids, Comets, Meteors 1993 (eds Milani, A., Di Martino, M. & Cellino, A.) 497–501 (IAU Symp. 160, Kluwer, Dordrecht, 1994).

    Book  Google Scholar 

  7. Taylor, A. D., Baggaley, W. J., Bennett, R. G. T. & Steel, D. I. Planet. Space Sci. 42, 135–140 (1994).

    ADS  Article  Google Scholar 

  8. Jones, J. & Sarma, T. Bull. astr. Inst. Czechoslov. 36, 103–115 (1985).

    ADS  Google Scholar 

  9. Hajduková, M. Jr in Meteoroids and their Parent Bodies (eds. Štohl, J. & Williams, I. P.) 61–64 (Slovak Acad. Sci., Bratislava, 1993).

    Google Scholar 

  10. Verniani, F. J. geophys. Res. 78, 8429–8462 (1973).

    ADS  Article  Google Scholar 

  11. Rowan-Robinson, M. Mon. Not. R. astr. Soc. 258, 787–799 (1992).

    ADS  CAS  Article  Google Scholar 

  12. Jaschek, C. & Valbousquet, A. Astr. Astrophys. 255, 124–129 (1992).

    ADS  Google Scholar 

  13. Jaschek, C. & Valbousquet, A. Astr. Astrophys. 242, 77–84 (1991).

    ADS  Google Scholar 

  14. Mihalas, D. & Binney, J. Galactic Astronomy: Structure and Kinematics (Freeman, San Francisco, 1981).

    Google Scholar 

  15. Eggen, O. J. Mon. Not. R. astr. Soc. 204, 377–390 (1983).

    ADS  CAS  Article  Google Scholar 

  16. Eggen, O. J. Mon. Not. R. astr. Soc. 204, 391–403 (1983).

    ADS  CAS  Article  Google Scholar 

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Taylor, A., Baggaley, W. & Steel, D. Discovery of interstellar dust entering the Earth's atmosphere. Nature 380, 323–325 (1996). https://doi.org/10.1038/380323a0

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  • DOI: https://doi.org/10.1038/380323a0

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