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.
No, Earth isn't the smallest planet. Earth is the fifth largest planet in our Solar System. It is larger than all the other inner (or 'Rocky') planets (Venus, Mars and Mercuâ¦ry) but smaller than the 4 outer planets (Jupiter, Saturn, Uranus and Neptune) . Mercury is the smallest planet despite the fact that a multitude of smaller objects orbit the Sun.