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| Description: Transformation and Evolution of a Long-Period Comet (a) The gravitational force of a giant planet can change a comet’s orbit. Comets initially on highly elliptical orbits are sometimes deflected into more circular paths that keep them in the inner solar system. (b–d) These figures show the evolution of a comet into gas, dust, and rubble, and why debris from some of these comets strikes Earth Picture Stats: Views: 652 Filesize: 142.67kB Height: 900 Width: 666 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18323 |