has been rounding
Present perfect progressivehe/sheconjugation ofround.

round

Planet X has been rounding the Sun since 2003, and is currently in the line of sight as those in the daytime gaze out toward the Sun.
El Planeta X ha estado alrededor del Sol desde 2003, y está en la línea de visión para quienes miran en dirección al Sol durante el día.
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