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.
Venus has the most circular orbit of any planet in the solar system. Its axial tilt is only three degrees, so there are no seasons on Venus. Since it orbits closer to the sun than Earth does, Venus orbits faster and completes a circuit every 7.4 months.But its day is much longer than Earthâs. Venus rotates once every eight months, so its day is actually longer than its year. This is the sidereal dayâthe rotation of Venus relative to the stars.enus has the most circular orbit of any planet in the solar system. Its axial tilt is only three degrees, so there are no seasons on Venus. Since it orbits closer to the sun than Earth does, Venus orbits faster and completes a circuit every 7.4 months.