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.
Feb 29, 2016. Earth. Our moon orbits Earth, so Earth is closest to the moon at about 384,000 km. Other than Earth, the closest planet would be Venus at about 38 million km away.