Medical Definition of PUMICE. : a volcanic glass full of cavities and very light in weight used especially in powder form for smoothing and polishing. a volcanic glass full of cavities and very low in density that is used especially in powder form for smoothing and polishing. â puÂ·miÂ·ceous \pyue-pyÃ¼-Ëmi, shÉs-\ ËpÉ. Adjective see pumice defined For-english language. learners
Another thing that differs between the two planets is the direction of their rotation. Venus s rotation takes longer than a year and it rotates backwards. Note that a rotation is when an object spins once on its own axis.Our planet takes only 24 hours, or one full Earth day, to rotate on its axis and a year to revolve around the Sun. Venus, however, takes 243 days to turn one time on its axis and almost 225 days to revolve around the Sun in orbit.nother thing that differs between the two planets is the direction of their rotation. Venus s rotation takes longer than a year and it rotates backwards. Note that a rotation is when an object spins once on its own axis.
No seriously, that is true, it takes about one year for venus to make a complete rotation (i dont mean revolution, but rotationâ¦ like spinning a basket ball.) Actually Venus rotates in about 243 Earth days and that's only about 8 months, not a year. One day on Venus is about 243 Earth days long. There are 24 hours in a day on Earth, 243 x 24=5832 hours. That's the rotation period, known as the sidereal day. But it's more complicated than that because you're ignoring the solar day. The solar day depends on a planet's motion round the Sun as well as its spin.