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.
But, Uranus and Venus have retrograde rotation where the axial rotation is opposite to the orbital motion; that is they have a clockwise axial rotation and a counter-clockwise orbital motion. This means that for Venus at least, the Sun rises in the west and sets in the east. Uranus is a bit different still. Its axial tilt, which is the angle the rotational axis of a planet makes to its orbital plane, is 97.7 degree. This sideways tilt gives Uranus a unique position in which its axis of rotation is nearly in its orbital plane.