Eyeglasses made of nylon were introduced in the late 1940s. Because of brittleness and other problems, eyeglass manufacturers switched to blended nylon (polyamides, co-polyamides and gliamides). Today's blended nylon frames are both strong and lightweight.
Venus is the closest size to Earth and is sometimes called Earth's sister planet.. Its diameter is 95% of Earth's but its mass is only 81% as much.
â¢ Earth is very small in comparison to Jupiter which is the largest planet of the solar system. â¢ The diameter of Jupiter is 11 times greater than the diameter of the earth. â¢ The two planets are neighbors with just Mars in between.