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News and Views
Nature 442, 640-641 (10 August 2006) | doi:10.1038/442640a; Published online 9 August 2006
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Solar System: Sifting through the debris
Asantha Cooray1
Abstract
A quadrillion previously unnoticed small bodies beyond Neptune have been spotted as they dimmed X-rays from a distant source. Models of the dynamics of debris in the Solar System's suburbs must now be reworked.
Until the time of Galileo, the Solar System was believed to consist of the Sun, the Moon and the six inner planets — including Earth — as far out as Saturn. Since then, we have added other gas giant planets (Neptune and Uranus), moons of other planets, the asteroid belt and, in 1930, Pluto.
- Asantha Cooray is in the Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
Email: acooray@uci.edu
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