Asteroid pp 133-151 | Cite as

What Else is Out there?

  • Patricia Barnes-Svarney


Contrary to popular belief, the nine planets and sundry satellites are not the only lurkers in the region we call the solar system. As we have discovered in previous chapters, asteroids, comets, meteors, gases, and dust play important roles in the inner and outer system. (If we wanted to be more thorough, we could also add all the debris sent into orbit around the Earth from unmanned and manned space missions.) And there are more objects out beyond the farthest planet, some of them directly tied to the asteroids.


Solar System Giant Planet Hubble Space Telescope Astronomical Unit Asteroid Belt 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. 1.
    C. W. Tombaugh and P.-Moore, Out of the Darkness: The Planet Pluto (Stackpole Books, Harrisburg, PA, 1980), pp. 25–27.Google Scholar
  2. 2.
    Ibid, pp. 142-143.Google Scholar
  3. 3.
    This subject has numerous sources, including personal communications with Clyde Tombaugh and David Levy; another source of the debate occurred in D. Green, J. Chambers, G. Williams, and D. Levy, Focal point, Sky & Telescope 88, 6–9 (1994).Google Scholar
  4. 4.
    C. W. Tombaugh, Plates, Pluto, and Planets X, Sky & Telescope 81, 360–361 (1991).ADSGoogle Scholar
  5. 5.
    Gerard Kuiper, in Astrophysics (J. A. Hynek, ed.) (McGraw-Hill, New York, 1951), pp. 357–424.Google Scholar
  6. 6.
    Science Frontiers 90, 1 (1993); Science News 147, 293 (1995); Sky & Telescope 90, 10 (1995).Google Scholar
  7. 7.
    Clyde Tombaugh, personal communication.Google Scholar

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© Patricia Barnes-Svarney 1996

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  • Patricia Barnes-Svarney

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