1 Kepler's Task. 2  Accurate Data. 3  Shape of the Path. 4  1. Planets move in ellipses with the Sun at one focus. 5  2. The radius vector describes equal areas in equal times. 6  3. Squares of periodic times are to each other as cubes of the mean distances.
So how fast do the average adult's nails grow? The simple answer is that fingernails grow about one-tenth of an inch (3 millimeters) a month. If you lose a fingernail, it will take four to six months to regrow completely. Toenails take a year to a year and a half to grow from cuticle to tip [source: Robb-Nicholson ].
Do All Nails Grow Same Rate. Each individual nail grows at its own pace. Usually, the longer the outermost finger joint, the faster the nail grows. The nail of the index finger thus grows quickly, while the thumbnail grows the slowest, as the thumb lacks the central of the three ordinary finger joints. On the toes, which are shorter than the fingers, the nails grow around three times as slowly.