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.
KeywordsSolar System Giant Planet Hubble Space Telescope Astronomical Unit Asteroid Belt
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