Today, we begin a series of reports that will discuss the latest scientific papers on the European Space Agency’s Rosetta mission to comet 67P. In addition to countless unresolved puzzles facing comet scientists, we have discussed in previous episodes the problem of comet’s double-lobed shape. Indeed, that particular form of a comet nucleus is apparently not unique; several other of the comets imaged to date have displayed similar forms. Multiple asteroids, including this one imaged on July 25th of this year, have displayed distinct peanut-like shapes, with a marked narrowing at the body’s neck. And recently, NASA’s New Horizons mission has revealed that the Plutonian moon Hydra also has a double-lobed form. Why do so many of these different types of bodies in the solar system display this particular shape?
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