The Weather Blog

July 05, 2009|By FRANK ROYLANCE | FRANK ROYLANCE,frank.roylance@baltsun.com

Jane Buxton Brown of Lakehurst wonders about the solar system: "Will you tell me how planets got into their orbits originally, and why they stay in them?" The planets condensed and grew amid cooling and collisions of gas and dust in the rotating solar "nebula" that circled the infant sun. Momentum will keep them circling unless something - the pull of a passing star, perhaps - kicks them out.

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