History of Eyeglasses and Sunglasses. The inventor of the first spectacle lenses is unknown. Roman tragedian Seneca (4 BC -65AD) is said to have used a glass globe of water as a magnifier to read ''all the books of Rome''. It's been reported that monks in the middle ages used glass spheres as magnifying glasses to read.
exists and is an alternate of . The Planet Venus has the slowest rotation rate because one day there is longer than the year on Venus or longer than its revolution around the sun. The Planet Venus has the slowest rotation rate because one day there is longer than the year on Venus or longer than its revolution around the sun.
Compared to Earth, Mercury has a very long day. A day on Mercury takes 58 days and 15 hours in Earth days. A day on Mercury is only a little shorter than a year on the planet.Venus is the slowest moving planet.ome astronomers believe that we will never know how long a day on Saturn is. A day on Uranus only takes 17 hours 14 minutes and 24 seconds. Since the planet has such an extreme axial tilt (97.8Â°), it actually rotates on its side. A day on Neptune lasts 16 hours 6 minutes and 36 seconds in Earth time.