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.
Earth and Uranus are known to be the closest if they are aligned together along with the sun on one side. This cuts the distance between the two planets. If this is the current position of Earth and Uranus, then the distance between them is about 2.57 billion kilometers. It is indeed still a very wide gap, knowing that Uranus is the third to the last planet from the sun; however this is the closest distance these two planets could ever have.