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.
Save. Venus is the closest planet to Earth and second closest to the sun. It was named after the Roman goddess of love and is often referred to as Earth's sister planet because of their similar size and composition.The atmosphere of Venus is filled with clouds of carbon dioxide and the surface is a dry desert.ave. Venus is the closest planet to Earth and second closest to the sun. It was named after the Roman goddess of love and is often referred to as Earth's sister planet because of their similar size and composition.